Parallel Circuits - Technical MCQs

Q1:

An open resistor in parallel will cause the total ___ to increase.

A voltage

B current

C resistance

D power

ANS:C - resistance

If a resistor in parallel would be opened then the total equivalent resistance would increase. Because we know that in parallel the total circuit resistance is always smaller than the smallest resistance, thus if a resistor becomes open in a PARALLEL circuit the total resistance increases and the total current decreases since there is now more resistance to oppose the current.