12TH ELECTROSTATICS 50 MCQS QUIZ

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Electrostatics – 5 MCQ Tests

50 Theory-Based Questions • 5 Tests • 10 Questions Each

Instructions: Select one option for every question and click Submit Test. The correct answer will appear inside each question after submission. Numerical/problem-solving questions have been excluded; these tests focus on theory and concepts.

Electrostatics – Test 1

10 Theory-Based Questions

Not Submitted

1

The electrostatic force obeys:

Source question: Q16

A. Newton's I law B. Newton's II law C. Newton's III law D. None of the above

2

The value of constant K in Coulomb's law is:

Source question: Q17

A. 0.9 × 10⁹ N m² C⁻² B. 9 × 10⁶ N m² C⁻² C. 9 × 10⁸ N m² C⁻² D. 9 × 10⁹ N m² C⁻²

3

The relative permittivity of water is:

Source question: Q18

A. 70 B. 75 C. 80 D. 85

4

The principle that, along with Coulomb's law, forms a fundamental principle of electrostatics is:

Source question: Q19

A. Newton's law of gravitation B. Superposition principle C. Ohm's law D. Kepler's law

5

The concept of 'Field' was introduced by:

Source question: Q27

A. Faraday B. Gauss C. Maxwell D. None

6

The force experienced by a unit charge is called:

Source question: Q28

A. Electric potential B. Electric flux C. Electric field D. Static electricity

7

Which one of these is a vector quantity?

Source question: Q30

A. Electric charge B. Electric field C. Electric flux D. Electric potential

8

The electric field created by a ______ is basically a non-uniform electric field.

Source question: Q31

A. Test charge B. Positive charge C. Negative charge D. Point charge

9

What will happen if two conducting spheres are separately charged and then brought in contact?

Source question: Q34

A. Total charge on the two spheres is conserved B. The total energy is conserved C. Both charge and energy are conserved D. The final potential is always zero

10

Increasing the charge on the plates of a capacitor means:

Source question: Q36

A. Increasing the capacitance B. Increasing the potential difference between the plates C. Both (a) and (b) D. None of the above

Electrostatics – Test 2

10 Theory-Based Questions

Not Submitted

1

A positively charged body A is brought near an isolated brass cylinder B. The potential of B will be:

Source question: Q37

A. Zero B. Negative C. Positive D. Infinite

2

Charge per unit volume is called:

Source question: Q39

A. Linear charge density B. Surface charge density C. Volume charge density D. Electric flux

3

The dipole is called a point dipole when the distance 2a and charge q approach:

Source question: Q41

A. 2a → ∞ and q → 0 B. 2a → 0 and q → ∞ C. 2a → 0 and q → 0 D. 2a → ∞ and q → ∞

4

The magnitude of torque on a dipole is maximum if the angle between the dipole moment and electric field is:

Source question: Q42

A. 0° B. 90° C. 180° D. 270°

5

At infinity (r = ∞), the electrostatic potential V is:

Source question: Q45

A. ∞ B. Maximum C. Minimum D. Zero

6

The unit for electric flux is:

Source question: Q47

A. C² N⁻¹ m⁻² B. N m⁻² C⁻¹ C. N m² C⁻¹ D. N m C⁻¹

7

The electric flux is negative if the angle between dA and E is:

Source question: Q48

A. Less than 90° B. Greater than 90° C. Equal to 90° D. Equal to 0°

8

The time taken by a conductor to reach electrostatic equilibrium is of the order of:

Source question: Q49

A. 10⁻¹⁸ s B. 10⁻¹⁴ s C. 10⁻²¹ s D. 10⁻⁷⁰ s

9

A non-conducting material which has no free electrons is called:

Source question: Q50

A. Capacitor B. Dielectric C. Conductor D. Inductor

10

The direction of electric field at a point on the equatorial line of an electric dipole is:

Source question: Q53

A. Along the equatorial line towards the dipole B. Along the equatorial line away from the dipole C. Parallel to the dipole axis and opposite to the dipole moment D. Parallel to the dipole axis in the direction of dipole moment

Electrostatics – Test 3

10 Theory-Based Questions

Not Submitted

1

The negative gradient of potential is:

Source question: Q55

A. Torque B. Electric current C. Electric field intensity D. Electric force

2

In tuning a radio we use:

Source question: Q58

A. Capacitors B. Transistors C. Diodes D. LEDs

3

The dielectric constant for metals is:

Source question: Q59

A. Zero B. Greater than 1 C. Less than 1 D. Infinite

4

An electric dipole placed at an angle in a non-uniform electric field experiences:

Source question: Q62

A. Neither a force nor a torque B. Torque C. Both force and torque D. Force only

5

Two copper spheres A and B of the same size are charged to the same potential. A is hollow and B is solid. Which holds more charge?

Source question: Q63

A. The solid sphere cannot hold any charge B. The hollow sphere cannot hold any charge C. Both have zero charge D. Both have the same charge

6

A bird sitting on a high-power line:

Source question: Q64

A. Gets killed instantly B. Gets a mild shock C. Is not affected practically D. Gets a fatal shock

7

Two conducting charged spheres X and Y having unequal charges are connected by a wire. Which is true?

Source question: Q65

A. Charge is conserved B. Electrostatic energy is conserved C. Both charge and electrostatic energy are conserved D. Neither is conserved

8

Which statement about an equipotential surface is wrong?

Source question: Q66

A. The potential difference between any two points on the surface is zero B. The electric field is always perpendicular to the surface C. An equipotential surface is always spherical D. No work is done in moving a charge along the surface

9

A spherical equipotential surface is not possible:

Source question: Q68

A. For a point charge B. For a dipole C. Inside a spherical capacitor D. Inside a uniformly charged sphere

10

The value of k in Coulomb's law depends upon:

Source question: Q72

A. Magnitude of charges B. Distance between charges C. Both magnitude and distance D. Medium between the two charges

Electrostatics – Test 4

10 Theory-Based Questions

Not Submitted

1

The region around a charge q in which it exerts force on a test charge is called:

Source question: Q73

A. Electric flux intensity B. Electric force C. Electric field D. Coulomb's force

2

The electric flux through a surface will be minimum when the angle between E and A is:

Source question: Q75

A. 90° B. 60° C. 0° D. 45°

3

One joule per coulomb is called:

Source question: Q76

A. Gauss B. Ampere C. Farad D. Volt

4

When three capacitors are joined in series, the total capacitance is:

Source question: Q77

A. Equal to the sum of the capacitances B. Greater than the maximum capacitance C. Less than the minimum capacitance D. None of the above

5

For a sharper edge, the ______ is greater. This principle is used in a lightning arrestor.

Source question: Q100

A. Linear charge density B. Surface charge density C. Volume charge density D. Capacitance

6

For continuous charge distributions, ______ methods can be used.

Source question: Q101

A. Integration B. Differentiation C. Multiplication D. Addition

7

For a large charge accumulation, the end of the conductor should have larger curvature, that is:

Source question: Q102

A. Bigger radius B. Smaller radius C. Maximum radius D. Less bent

8

Relative permittivity (εr) is also known as:

Source question: Q103

A. Dielectric strength B. Dielectric constant C. Polarisability D. Susceptibility

9

The energy stored per unit volume of space is defined as:

Source question: Q104

A. Linear density B. Surface density C. Volume density D. Energy density

10

Which is a very large unit of capacitance?

Source question: Q105

A. Farad B. Microfarad C. Picofarad D. Nanofarad

Electrostatics – Test 5

10 Theory-Based Questions

Not Submitted

1

The total dipole moment per unit volume of a dielectric is called:

Source question: Q106

A. Induction B. Charge distribution C. Polarisation D. Quantisation

2

An example of a non-polar molecule is:

Source question: Q107

A. H₂O B. N₂O C. CO₂ D. NH₃

3

Which instrument was used to demonstrate electrostatic shielding?

Source question: Q108

A. Lightning arrester B. Van de Graaff generator C. Faraday cage D. Gold-leaf electroscope

4

Gauss's law is another form of:

Source question: Q109

A. Newton's law B. Kepler's law C. Ohm's law D. Coulomb's law

5

The electric flux is ______ if the electric field lines enter a closed surface.

Source question: Q111

A. Positive B. Negative C. Zero D. Maximum

6

Which of the following is a scalar quantity?

Source question: Q113

A. Electric dipole moment B. Electric field intensity C. Electric potential D. Current density

7

Capacitors use the principle of:

Source question: Q114

A. Self induction B. Mutual induction C. Electrostatic induction D. Dielectric polarisation

8

Electrostatics deals with:

Source question: Q116

A. Charges in motion B. Static electric charges C. Charges through conductors D. Accelerated charges

9

The force between like charges is:

Source question: Q118

A. Attraction B. Repulsion C. No force D. None

10

The device used for storing charges is:

Source question: Q121

A. Resistor B. Capacitor C. Inductor D. Insulator

Electrostatics MCQ Practice

Based on the uploaded Electrostatics question bank