Electromagnetism – Online MCQs – Physics 10th

1. The force F acting on the particle is directly proportional to the

charge ‘q’ and velocity ‘v’

velocity ‘v’

charge ‘q’

None of them

2. 1 Tesla = _________________

10^-4 Gauss

10^-2 Gauss

10² Gauss

10⁴ Gauss

3. The power is transmitted over long distances with high voltage to:

maximize the energy loss

keep current constant

minimize the energy loss

keep energy constant

4. A current carrying coil kept in a magnetic field, experiences a torque, which is the:

the cross product of the magnetic moment and field vector

the cross product of the field vector and magnetic moment

the dot product of the magnetic moment and field vector

the dot product of the field vector and magnetic moment

5. A D.C motor converts:

electrical energy into chemical energy

electrical energy into mechanical energy

mechanical energy into electrical energy

mechanical energy into chemical energy

6. The induced emf of a coil is directly proportional to:

the total number of turns in the coil & the area of cross-section of the coil

the strength of the magnetic field & the angular velocity of the coil

None of them

Both of these

7. The magnetic field is the strongest:

None of these

near the poles

at the centre

Bothe of these

8. The magnetic force experienced by a charged particle moving in a magnetic field will be minimum when it moves:

Both of these

None of them

parallel to the field

perpendicular to the field

9. A current carrying coil kept in a magnetic field experiences a torque which is zero when the:

parallel to the field

dipole moment is perpendicular to the field

Both of these

antiparallel to the field

10. When electric charges are at rest, they exert:

electrostatic force

weak nuclear force

strong nuclear force

electromagnetic force

11. The earth’s magnetic field is:

50 T

500 µT

500 T

50 µT

12. There are _________ fundamental forces in nature.

five

two

four

three

13. If we had a wire with the right hand such that the thumb pointed in the direction of the current, then the curling fingers of the hand will point the:

force

magnetic field

voltage

None of above

14. In a transformer, the primary coil is connected to:

alternating current (AC) source

galvanometer

direct current (DC) source

ammeter

15. We apply Lenz’s law to find out the direction of:

electric field

electromagnetic induction

magnetic field

current induced in a circuit

16. A practical application of mutual induction is called:

transformer

circuit breaker

fuse

generator

17. When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon:

motion of the magnet

resistance of the coil

area of the cross-section of the coil

number of turns of the coil

18. At the generating station, the AC voltage is:

None of above

kept constant

stepped up

stepped down

19. The number of coils in a transformer is:

two

four

three

one

20. The magnetic field direction around a current-carrying conductor can be determined using the Flemings

none of these

left hand rule

right and left hand rule

right hand rule

Online MCQs Test | Unit 16 : Electromagnetism | Physics Class 10th | Sindh Board Science Group