12TH Physics - Magnetism and Magnetic Effects of Electric Current MCQS QUIZ

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Magnetism MCQ Test

1. The angle of dip at a place, when the horizontal and vertical components of Earth's magnetic field are equal, is ______.

45°
60°
30°
0°

2. The period of revolution of a charged particle inside a cyclotron does not depend on the ______.

Charge of the particle
Mass of the particle
Velocity of the particle
Momentum of the particle

3. The torque experienced by a rectangular current loop placed perpendicular to a uniform magnetic field is ______.

Maximum
Minimum
Zero
Infinity

4. A simple current loop behaves like a ______.

Solenoid
Toroid
Inductance
Bar Magnet

5. The resistance of an ideal ammeter is ______.

Large
Infinite
Zero
Small

6. Two parallel wires carrying equal currents in opposite directions experience ______.

Attractive force
Magnetic force only
Electric force
Repulsive force

7. In which device is the heating effect of current undesirable?

Electric iron
Electric motor
Fuse wire
Electric bulb

8. A 110 W, 220 V bulb draws a current of ______.

2 A
440 A
0.5 A
5.5 A

9. The melting point of tungsten is approximately ______.

3830°C
2380°C
3380°C
3803°C

10. The SI unit of magnetic field is ______.

Ampere-turn
Ampere
Newton/Coulomb
Tesla

11. The magnetic field close to a straight current-carrying conductor is ______.

Along the conductor
Radially outward
Circular in a plane perpendicular to the conductor
Helical

12. The most suitable material for making a permanent magnet is ______.

Copper
Aluminium
Steel
Iron

13. When current is doubled, the deflection is also doubled in ______.

Moving coil galvanometer
Tangent galvanometer
Both of them
Neither

14. The direction of magnetic force on a positive charge moving in a magnetic field is given by ______.

Thumb rule
Left hand rule
Right hand rule
Cork screw rule

15. If a current I flows along the x-axis and the magnetic field is along the y-axis, the force on the wire acts in the ______.

Z-direction
Y-direction
No force
X-direction