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

Question : 1

For electroplating a spoon, it is placed in the voltameter at

a) the position of cathode

b) exactly in the middle of anode and cathode

c) the position of anode

d) anywhere in the electrolyte

Question : 2 [UPPCS (Pre) 2007]

In a three-pin electrical plug longest pin should be connected to

a) Neutral terminal

b) Ground terminal

c) Live terminal

d) Any terminal

Question : 3

Whenever, current is changed in a coil, an induced e.m.f. is produced in the same coil. This property of the coil is due to

a) self induction

b) eddy currents

c) mutual induction

d) hysteresis

Question : 4

Potential at any point inside a charged hollow sphere

a) is a constant

b) decreases with distance from centre

c) increases with distance

d) is zero

Question : 5

Demagnetisation of magnets can be done by

a) magnetising in the opposite direction

b) rough handling

c) heating

d) All of the above