Electromagnetism – Online MCQs – Physics 10th

1. As per Michael Faraday, the force is increased if the:

All of above

length of wire increased

current in the wire is increased

magnetic field’s strength increased

2. If the secondary voltage is lower than the primary voltage, the transformer is called a:

step down transformer

voltage transformer

step up transformer

ideal transformer

3. The presence of a magnetic field can be detected by a:

magnetic compass

stationary negative charge

stationary positive charge

small mass

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

stepped up

None of above

stepped down

remains constant

5. 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

perpendicular to the field

parallel to the field

6. The magnetic field is the strongest:

near the poles

at the centre

Bothe of these

None of these

7. In the transformer, if the secondary voltage is more than the primary voltage then it is called:

step up transformer

step down transformer

ideal transformer

voltage transformer

8. There are _________ fundamental forces in nature.

five

two

three

four

9. The direction of the induced current is given by:

Fleming’s left-hand rule

right hand thumb rule

Fleming’s right-hand rule

left hand thumb rule

10. If the secondary voltage exceeds the primary voltage, the transformer is called a:

step-down transformer

positive transformer

negative transformer

step-up transformer

11. The direction of induced e.m.f. in a circuit is in accordance with the conservation of:

momentum

energy

mass

charge

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

current induced in a circuit

electric field

electromagnetic induction

magnetic field

13. What is the direction of the magnetic field lines inside a bar magnet?

There are no magnetic field lines

From side to side

From south pole to north pole

From north pole to south pole

14. Which statement is true about the magnetic poles?

like poles attract

a single magnetic pole does not exist

unlike poles repel

magnetic poles do not affect each other

15. A magnetic field:

always exerts a force on a charged particle

Never exerts a force on a charged particle

exerts a force if the charged particle is moving perpendicular to the magnetic field lines

exerts a force if the charged particle is moving in the direction of the magnetic field lines

16. The direction of induced current in a circuit is always such that it opposes the cause that produces it. This law was presented by:

Joseph Henery

Faraday

Lenz

William Sturgeon

17. Tesla is a unit of:

electromagnetic force

magnetic flux density

magnetic field strength

electromagnetic inductance

18. The current-carrying loop inside the magnetic field rotate due to the:

electric field acting on the coil

voltage acting on the coil

current acting on the coil

torque acting on the coil

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

Both of these

dipole moment is perpendicular to the field

parallel to the field

antiparallel to the field

20. When a coil rotated in a magnetic field the induced current in it:

remains same

continuously changes

becomes maximum

becomes zero

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