NEET 100 MCQS QUIZ PHYSICS 27 AUGUST

Physics Part 3 – Theory MCQ Online Tests

10 Tests × 10 Questions = 100 Theory Questions

Theory Questions Only: Numerical/calculation-based questions have been excluded. Questions are based on the uploaded Physics Part 3 material.

Test 1 – 10 Theory Questions

1. The speed of light in an isotropic medium depends on the:

A) Intensity of light B) Nature of the medium C) Size of the source D) Brightness of the source

Correct Answer: B) Nature of the medium

More Resources: Ravi Test Papers

2. Stars appear to twinkle mainly because of:

A) Reflection B) Total internal reflection C) Refraction in the atmosphere D) Polarisation

Correct Answer: C) Refraction in the atmosphere

More Resources: Ravi Test Papers – Main Site

3. A plane mirror normally forms an image that is:

A) Real and inverted B) Virtual and erect C) Real and erect D) Virtual and inverted

Correct Answer: B) Virtual and erect

More Resources: NEET English Medium

4. The magnification produced by a plane mirror is:

A) -1 B) +1 C) 0 D) Greater than 1

Correct Answer: B) +1

More Resources: NEET Tamil Medium

5. When a plane mirror is rotated through an angle θ, the reflected ray turns through:

A) θ/2 B) θ C) 2θ D) 4θ

Correct Answer: C) 2θ

More Resources: JEE Maths

6. For normal incidence on a plane mirror, the angle of reflection is:

A) 0° B) 45° C) 90° D) 180°

Correct Answer: A) 0°

More Resources: JEE Physics

7. The incident ray and the reflected ray from two plane mirrors can be parallel when the mirrors are inclined at:

A) 60° B) 90° C) 120° D) 175°

Correct Answer: B) 90°

More Resources: JEE Chemistry

8. Ray optics is applicable when the characteristic dimensions involved are:

A) Much smaller than the wavelength B) Comparable with the wavelength C) Much larger than the wavelength D) Exactly equal to the wavelength

Correct Answer: C) Much larger than the wavelength

More Resources: Online Quiz

9. A convex mirror forms the image of a real object as:

A) Real, inverted and magnified B) Virtual, erect and diminished C) Real, erect and magnified D) Virtual, inverted and magnified

Correct Answer: B) Virtual, erect and diminished

More Resources: Class 12 Physics Test Papers

10. Which mirror can produce a virtual, erect and magnified image?

A) Convex mirror B) Plane mirror only C) Concave mirror D) None of these

Correct Answer: C) Concave mirror

More Resources: Class 12 Chemistry Test Papers

Test 2 – 10 Theory Questions

1. A concave mirror can form a real image when the object is placed:

A) Between pole and focus B) Beyond the focus C) Only at the pole D) Only at the focus

Correct Answer: B) Beyond the focus

More Resources: Class 12 Biology Test Papers

2. A concave mirror forms a virtual, erect and magnified image when the object is placed:

A) Beyond the centre of curvature B) At the centre of curvature C) Between pole and focus D) At infinity

Correct Answer: C) Between pole and focus

More Resources: CBSE Class 12 Physics

3. A convex mirror always produces an image that is:

A) Real and inverted B) Virtual and erect C) Real and erect D) Virtual and inverted

Correct Answer: B) Virtual and erect

More Resources: Ravi Test Papers

4. For a spherical mirror, the relation between focal length f and radius of curvature R is:

A) R = f B) R = 2f C) R = 3f D) R = f/2

Correct Answer: B) R = 2f

More Resources: Ravi Test Papers – Main Site

5. A convex mirror is commonly used as a vehicle rear-view mirror because it:

A) Forms magnified images B) Provides a wider field of view C) Forms real images D) Always forms same-sized images

Correct Answer: B) Provides a wider field of view

More Resources: NEET English Medium

6. A dentist uses a concave mirror because it can provide a:

A) Diminished virtual image B) Magnified erect image for a nearby object C) Real diminished image only D) Same-sized virtual image only

Correct Answer: B) Magnified erect image for a nearby object

More Resources: NEET Tamil Medium

7. A concave mirror can focus parallel rays at its:

A) Pole B) Centre of curvature C) Focus D) Behind the mirror

Correct Answer: C) Focus

More Resources: JEE Maths

8. A convex lens generally forms a virtual, erect and magnified image when the object is placed:

A) Beyond 2F B) At 2F C) Between the optical centre and focus D) At infinity

Correct Answer: C) Between the optical centre and focus

More Resources: JEE Physics

9. A concave lens forms an image that is:

A) Always virtual, erect and diminished B) Always real and magnified C) Always real and inverted D) Always same-sized and real

Correct Answer: A) Always virtual, erect and diminished

More Resources: JEE Chemistry

10. Among the following, which optical device forms a virtual and erect image for all object positions?

A) Convex lens B) Concave lens C) Concave mirror D) Both concave lens and convex mirror

Correct Answer: D) Both concave lens and convex mirror

More Resources: Online Quiz

Test 3 – 10 Theory Questions

1. When a biconvex glass lens acts like a plane sheet in a liquid, the refractive index of the liquid is:

A) Less than 1 B) Less than glass C) Greater than glass D) Equal to that of glass

Correct Answer: D) Equal to that of glass

More Resources: Class 12 Physics Test Papers

2. Total internal reflection can occur when light travels from:

A) Rarer to denser medium B) Denser to rarer medium C) Vacuum to air only D) Air to vacuum only

Correct Answer: B) Denser to rarer medium

More Resources: Class 12 Chemistry Test Papers

3. One essential condition for total internal reflection is that the angle of incidence must be:

A) Less than the critical angle B) Equal to zero C) Greater than the critical angle D) Always 45°

Correct Answer: C) Greater than the critical angle

More Resources: Class 12 Biology Test Papers

4. The critical angle is defined for light travelling from a:

A) Rarer medium to denser medium B) Denser medium to rarer medium C) Vacuum to vacuum D) Opaque medium to transparent medium

Correct Answer: B) Denser medium to rarer medium

More Resources: CBSE Class 12 Physics

5. The apparent depth of an object under a transparent medium is generally:

A) Greater than its real depth B) Less than its real depth C) Equal to its real depth in all cases D) Always zero

Correct Answer: B) Less than its real depth

More Resources: Ravi Test Papers

6. A mirage is associated with:

A) Atmospheric refraction and total internal reflection B) Only diffraction C) Only polarisation D) Only interference

Correct Answer: A) Atmospheric refraction and total internal reflection

More Resources: Ravi Test Papers – Main Site

7. The refractive index of a medium is related to the speed of light in that medium such that a higher refractive index corresponds to:

A) Higher speed B) Lower speed C) No change in speed D) Infinite speed

Correct Answer: B) Lower speed

More Resources: NEET English Medium

8. When light enters a denser medium from a rarer medium, it generally bends:

A) Away from the normal B) Towards the normal C) Along the surface D) Back into the source

Correct Answer: B) Towards the normal

More Resources: NEET Tamil Medium

9. A ray travelling normally from one transparent medium into another has an angle of incidence of:

A) 0° B) 30° C) 60° D) 90°

Correct Answer: A) 0°

More Resources: JEE Maths

10. Optical fibres primarily make use of:

A) Diffraction B) Total internal reflection C) Polarisation only D) Dispersion only

Correct Answer: B) Total internal reflection

More Resources: JEE Physics

Test 4 – 10 Theory Questions

1. Young’s double-slit experiment demonstrates the wave nature of light through:

A) Interference B) Photoelectric emission C) Thermionic emission D) Electron emission

Correct Answer: A) Interference

More Resources: JEE Chemistry

2. The sources in Young’s double-slit experiment should be:

A) Coherent B) Independent and random C) Non-monochromatic only D) Opaque

Correct Answer: A) Coherent

More Resources: Online Quiz

3. Fringe spacing in Young’s double-slit experiment depends on the:

A) Wavelength, screen distance and slit separation B) Mass of the source C) Temperature only D) Intensity only

Correct Answer: A) Wavelength, screen distance and slit separation

More Resources: Class 12 Physics Test Papers

4. If one slit in Young’s double-slit arrangement is covered by a glass plate, the optical path difference is changed and the central maximum:

A) Can shift B) Must disappear C) Always remains fixed D) Becomes a diffraction minimum

Correct Answer: A) Can shift

More Resources: Class 12 Chemistry Test Papers

5. The superposition of coherent light waves can produce:

A) Interference B) Only reflection C) Only refraction D) Only dispersion

Correct Answer: A) Interference

More Resources: Class 12 Biology Test Papers

6. Constructive interference corresponds to:

A) Reinforcement of waves B) Complete cancellation of waves C) No wave interaction D) Only polarisation

Correct Answer: A) Reinforcement of waves

More Resources: CBSE Class 12 Physics

7. Destructive interference corresponds to:

A) Maximum reinforcement B) Cancellation due to phase difference C) Refraction only D) Total internal reflection

Correct Answer: B) Cancellation due to phase difference

More Resources: Ravi Test Papers

8. Diffraction is the:

A) Bending/spreading of waves around apertures or obstacles B) Complete absorption of light C) Conversion of light into heat D) Reflection from a plane mirror

Correct Answer: A) Bending/spreading of waves around apertures or obstacles

More Resources: Ravi Test Papers – Main Site

9. The transverse nature of light is demonstrated by:

A) Polarisation B) Reflection only C) Refraction only D) Photoelectric effect

Correct Answer: A) Polarisation

More Resources: NEET English Medium

10. Light transmitted by a Nicol prism is:

A) Unpolarised B) Partially polarised C) Plane polarised D) Circularly polarised

Correct Answer: C) Plane polarised

More Resources: NEET Tamil Medium

Test 5 – 10 Theory Questions

1. The emission of electrons from a metal surface due to incident radiation is called:

A) Thermionic emission B) Photoelectric effect C) Field emission D) Secondary emission

Correct Answer: B) Photoelectric effect

More Resources: JEE Maths

2. The photoelectric current is due to the flow of:

A) Photons B) Protons C) Electrons D) Neutrons

Correct Answer: C) Electrons

More Resources: JEE Physics

3. The minimum frequency required for photoelectric emission is called:

A) Stopping frequency B) Threshold frequency C) Saturation frequency D) Resonant frequency

Correct Answer: B) Threshold frequency

More Resources: JEE Chemistry

4. The minimum energy required to liberate an electron from a metal surface is called:

A) Work function B) Stopping potential C) Saturation energy D) Rest energy

Correct Answer: A) Work function

More Resources: Online Quiz

5. The maximum kinetic energy of photoelectrons is related to photon energy and work function by:

A) Kmax = hν + φ B) Kmax = hν − φ C) Kmax = φ − hν D) Kmax = hνφ

Correct Answer: B) Kmax = hν − φ

More Resources: Class 12 Physics Test Papers

6. Einstein’s explanation of the photoelectric effect is based on the:

A) Quantum theory of light B) Classical wave theory alone C) Corpuscular theory of sound D) Theory of gravitation

Correct Answer: A) Quantum theory of light

More Resources: Class 12 Chemistry Test Papers

7. The energy of a photon is given by:

A) E = hν B) E = h/ν C) E = ν/h D) E = mc only

Correct Answer: A) E = hν

More Resources: Class 12 Biology Test Papers

8. The energy spent in releasing a photoelectron is called the metal’s:

A) Work function B) Stopping potential C) Saturation current D) Threshold current

Correct Answer: A) Work function

More Resources: CBSE Class 12 Physics

9. At the stopping potential, the photoelectric current becomes:

A) Maximum B) Zero C) Infinite D) Constant at its saturation value

Correct Answer: B) Zero

More Resources: Ravi Test Papers

10. The stopping potential is used to stop the:

A) Incident photons B) Most energetic photoelectrons C) Protons in the source D) Atoms in the metal

Correct Answer: B) Most energetic photoelectrons

More Resources: Ravi Test Papers – Main Site

Test 6 – 10 Theory Questions

1. Increasing the intensity of incident light, while frequency remains above threshold, generally increases the:

A) Photoelectric current B) Work function C) Threshold frequency D) Maximum kinetic energy

Correct Answer: A) Photoelectric current

More Resources: NEET English Medium

2. Increasing the intensity of light does not directly increase the:

A) Number of emitted photoelectrons B) Photoelectric current C) Maximum kinetic energy of photoelectrons D) Photon flux

Correct Answer: C) Maximum kinetic energy of photoelectrons

More Resources: NEET Tamil Medium

3. The maximum kinetic energy of photoelectrons depends primarily on the:

A) Frequency of incident radiation B) Intensity alone C) Exposure time alone D) Size of the metal plate

Correct Answer: A) Frequency of incident radiation

More Resources: JEE Maths

4. If incident frequency is below threshold frequency, increasing intensity will:

A) Cause photoemission B) Increase stopping potential C) Not produce photoelectric emission D) Double the work function

Correct Answer: C) Not produce photoelectric emission

More Resources: JEE Physics

5. When the frequency of incident radiation is equal to threshold frequency, the stopping potential is:

A) Zero B) Maximum C) Infinite D) Negative infinity

Correct Answer: A) Zero

More Resources: JEE Chemistry

6. If the frequency of incident radiation is increased, the stopping potential generally:

A) Increases B) Decreases C) Becomes zero D) Is unaffected in all cases

Correct Answer: A) Increases

More Resources: Online Quiz

7. The graph of maximum kinetic energy versus frequency of incident radiation is a:

A) Straight line B) Circle C) Parabola D) Ellipse

Correct Answer: A) Straight line

More Resources: Class 12 Physics Test Papers

8. The slope of the Kmax versus frequency graph is associated with:

A) Planck’s constant B) Work function only C) Intensity only D) Electron charge only

Correct Answer: A) Planck’s constant

More Resources: Class 12 Chemistry Test Papers

9. The threshold frequency is characteristic of the:

A) Metal surface B) Intensity of source only C) Distance of observer only D) Shape of apparatus only

Correct Answer: A) Metal surface

More Resources: Class 12 Biology Test Papers

10. Photoelectric emission from a suitable metal can occur almost immediately after illumination because the energy transfer is:

A) Continuous and delayed B) Quantised and direct C) Dependent only on heating D) Independent of photon energy

Correct Answer: B) Quantised and direct

More Resources: CBSE Class 12 Physics

Test 7 – 10 Theory Questions

1. A photoelectric cell converts:

A) Light energy into electrical energy B) Electrical energy into light only C) Heat into sound D) Sound into light

Correct Answer: A) Light energy into electrical energy

More Resources: Ravi Test Papers

2. In a photoemissive cell, the evacuated bulb is made of:

A) Plastic B) Nylon C) Quartz D) Wood

Correct Answer: C) Quartz

More Resources: Ravi Test Papers – Main Site

3. The cathode of a photoemissive cell is coated with a material having:

A) Low work function B) Very high work function C) No electrons D) Only transparent properties

Correct Answer: A) Low work function

More Resources: NEET English Medium

4. A low-work-function cathode is used so that:

A) Photoelectrons can be emitted more easily B) No photons are absorbed C) The anode becomes an insulator D) The current always becomes zero

Correct Answer: A) Photoelectrons can be emitted more easily

More Resources: NEET Tamil Medium

5. The anode of a simple photoemissive cell is described in the source as a:

A) Platinum wire B) Glass tube C) Quartz crystal D) Iron sheet

Correct Answer: A) Platinum wire

More Resources: JEE Maths

6. Photoelectric cells are used in cinematography for:

A) Reproducing sound B) Making mirrors C) Heating film D) Producing X-rays

Correct Answer: A) Reproducing sound

More Resources: JEE Physics

7. Photoelectric cells can be used to control the:

A) Temperature of furnaces B) Mass of furnaces C) Colour of furnaces D) Shape of furnaces

Correct Answer: A) Temperature of furnaces

More Resources: JEE Chemistry

8. During space travel, photoelectric cells can obtain electrical energy from:

A) Sunlight B) Coal C) Petrol D) Steam

Correct Answer: A) Sunlight

More Resources: Online Quiz

9. Photoelectric cells are used in:

A) Burglar and fire alarms B) Only refrigerators C) Only microscopes D) Only radios

Correct Answer: A) Burglar and fire alarms

More Resources: Class 12 Physics Test Papers

10. In a burglar alarm, light is continuously arranged to fall on the:

A) Photo cell B) Mirror C) Lens only D) Cathode-ray tube

Correct Answer: A) Photo cell

More Resources: Class 12 Chemistry Test Papers

Test 8 – 10 Theory Questions

1. The symbol h represents:

A) Planck’s constant B) Boltzmann constant C) Gravitational constant D) Gas constant

Correct Answer: A) Planck’s constant

More Resources: Class 12 Biology Test Papers

2. The momentum of a photon is related to its energy E and speed of light c by:

A) p = Ec B) p = E/c C) p = c/E D) p = E²/c

Correct Answer: B) p = E/c

More Resources: CBSE Class 12 Physics

3. When the wavelength of a photon decreases, its energy:

A) Decreases B) Increases C) Remains zero D) Becomes independent of wavelength

Correct Answer: B) Increases

More Resources: Ravi Test Papers

4. When the wavelength of a photon decreases, its momentum:

A) Increases B) Decreases C) Remains constant D) Becomes zero

Correct Answer: A) Increases

More Resources: Ravi Test Papers – Main Site

5. Matter waves are associated with:

A) Moving material particles B) Only photons C) Only sound waves D) Only stationary mirrors

Correct Answer: A) Moving material particles

More Resources: NEET English Medium

6. Louis de Broglie extended wave-particle duality to:

A) Matter particles B) Only light rays C) Only sound D) Only heat

Correct Answer: A) Matter particles

More Resources: NEET Tamil Medium

7. The de Broglie wavelength is inversely proportional to a particle’s:

A) Momentum B) Charge only C) Mass only D) Temperature only

Correct Answer: A) Momentum

More Resources: JEE Maths

8. If the momentum of a particle increases, its de Broglie wavelength:

A) Increases B) Decreases C) Does not change D) Becomes infinite

Correct Answer: B) Decreases

More Resources: JEE Physics

9. According to the source, the electron microscope is based on:

A) Matter waves B) Geometrical optics only C) Thermionic emission D) Total internal reflection

Correct Answer: A) Matter waves

More Resources: JEE Chemistry

10. The resolving power of a microscope is related to the:

A) Wavelength of the radiation used B) Colour of the microscope body C) Mass of the observer D) Size of the room

Correct Answer: A) Wavelength of the radiation used

More Resources: Online Quiz

Test 9 – 10 Theory Questions

1. On the basis of de Broglie’s hypothesis, electrons in atomic orbits behave as:

A) Waves B) Only stationary objects C) Sound particles D) Photons only

Correct Answer: A) Waves

More Resources: Class 12 Physics Test Papers

2. The orbits containing complete electron waves are called:

A) Stationary orbits B) Random orbits C) Half-integral orbits D) Thermal orbits

Correct Answer: A) Stationary orbits

More Resources: Class 12 Chemistry Test Papers

3. De Broglie’s concept provides support for a postulate of:

A) Bohr B) Newton C) Huygens only D) Maxwell only

Correct Answer: A) Bohr

More Resources: Class 12 Biology Test Papers

4. The total angular momentum of an electron in an allowed orbit is quantised in integral multiples of:

A) h/2π B) 2πh C) h² D) c/h

Correct Answer: A) h/2π

More Resources: CBSE Class 12 Physics

5. The electron microscope is useful for:

A) Magnifying very small objects B) Observing only stars C) Measuring atmospheric pressure D) Generating heat

Correct Answer: A) Magnifying very small objects

More Resources: Ravi Test Papers

6. The wave nature of matter is demonstrated by:

A) Electron diffraction B) Photon diffraction only C) Thermionic emission D) Reflection from mirrors

Correct Answer: A) Electron diffraction

More Resources: Ravi Test Papers – Main Site

7. The new wave mechanics associated with particles is called:

A) Quantum mechanics B) Classical mechanics C) Static mechanics D) Geometrical mechanics

Correct Answer: A) Quantum mechanics

More Resources: NEET English Medium

8. Light exhibits:

A) Wave-particle duality B) Only particle nature C) Only wave nature D) Only mechanical nature

Correct Answer: A) Wave-particle duality

More Resources: NEET Tamil Medium

9. The photon behaves as a particle particularly in the:

A) Photoelectric emission B) Diffraction pattern only C) Polarisation of light D) Reflection from a plane mirror only

Correct Answer: A) Photoelectric emission

More Resources: JEE Maths

10. The photoelectric effect is important evidence for the:

A) Quantum nature of light B) Purely classical nature of light C) Mechanical nature of light D) Gravitational nature of light

Correct Answer: A) Quantum nature of light

More Resources: JEE Physics

Test 10 – 10 Theory Questions

1. The electromagnetic theory of light was proposed by:

A) Maxwell B) Max Planck C) Einstein D) Hertz

Correct Answer: A) Maxwell

More Resources: JEE Chemistry

2. Quantum theory was proposed by:

A) Max Planck B) Maxwell C) Newton D) Huygens

Correct Answer: A) Max Planck

More Resources: Online Quiz

3. Einstein’s photoelectric theory explains photoelectric emission using:

A) Quanta of light B) Only continuous energy transfer C) Only thermal radiation D) Only sound waves

Correct Answer: A) Quanta of light

More Resources: Class 12 Physics Test Papers

4. A photon has:

A) Energy but zero rest mass B) Rest mass but zero energy C) Neither energy nor momentum D) Infinite mass

Correct Answer: A) Energy but zero rest mass

More Resources: Class 12 Chemistry Test Papers

5. The particle that has zero rest mass but carries energy is the:

A) Photon B) Electron C) Proton D) Neutron

Correct Answer: A) Photon

More Resources: Class 12 Biology Test Papers

6. According to special relativity, the quantity that is invariant for all inertial frames among the choices is:

A) Mass B) Length C) Time D) Velocity of light

Correct Answer: D) Velocity of light

More Resources: CBSE Class 12 Physics

7. When the frequency of incident radiation is below threshold, photoelectric emission is:

A) Impossible for that metal B) Guaranteed at high intensity C) Independent of frequency D) Always delayed

Correct Answer: A) Impossible for that metal

More Resources: Ravi Test Papers

8. Thermionic emission is the emission of electrons due to absorption of:

A) Heat energy B) Light energy only C) Sound energy D) Magnetic energy

Correct Answer: A) Heat energy

More Resources: Ravi Test Papers – Main Site

9. The photoelectric current at saturation is proportional to the:

A) Intensity of incident radiation B) Work function only C) Threshold frequency only D) Stopping potential only

Correct Answer: A) Intensity of incident radiation

More Resources: NEET English Medium

10. The photoelectric cell is fundamentally based on the:

A) Photoelectric effect B) Doppler effect C) Nuclear fission D) Electromagnetic induction only

Correct Answer: A) Photoelectric effect

More Resources: NEET Tamil Medium

© Ravi Test Papers