Download Aptitude Crack
img not found img not found

Inductors - Technical MCQs

Q1:

The polarity of induced voltage while a field is collapsing is:

A independent of the force creating it

B opposite to the force creating it

C identical to the force creating the field

D present only if the force is stationary

ANS:B - opposite to the force creating it

"However, when the switch is opened, the coil's inductance responds to the decrease in current by inducing a voltage of reverse polarity, in an effort to maintain current at the same magnitude and in the same direction."