Physics MCQs Chapter 15+16

1.     Energy stored in a magnetic field is given by

a)     LI²

b)    L²I/2

c)     LI²/2

d)    IL²

2.     Inductors acts as a short circuit for

a)     Alternating current (AC)

b)    Direct current (DC)

c)     Both A and B

d)    None of these

3.     Eddy currents are used in

a)     Electromagnetic brakes oil

b)    Induction furnace only

c)     Speedometers only

d)    All of these

1.c

2.b

3.d