electric current and magnetism - Category wise Question and Answer Practice Test with Solutions

Question : 1

A compass which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It

a) will stay in any position

b) will stay in north-south direction only

c) will stay in east-west direction only

d) None of these

Question : 2

Consider the following statements regarding electric fuse wire:

1. It has low melting point.
2. It has very high specific resistance.
3. It is connected in parallel with the electric circuit.

a) 1 and 2

b) 1 only

c) 1 and 3

d) 2 and 3

Question : 3 [BPSC (Pre) 1996]

If a bulb of 100 watt burns for 10 hours, the expenditure of electricity will be

a) 10 units

b) 0-1 unit

c) 1 unit

d) 100 units

Question : 4

Choke coil works on the principle of

a) self induction

b) mutual induction

c) transient current

d) wattless current

Question : 5

Consider the following statements :

1. The strength of magnetic field of a permanent magnet decreases with the increase in temperature.
2. A permanent magnet can be demagnetised by beating it.
3. A charged particle moving parallel to direction of magnetic field experiences a force.

a) 1 and 3

b) 1 and 2

c) 2 and 3

d) 1, 2 and 3