Series-Parallel Circuits - Technical MCQs

Q1:

If R1 is in series with a parallel combination of R2, R3, and R4, when the resistance value of R2 increases, the voltage across R3 will

A increase

B decrease

C remain the same

D Cannot tell

ANS:A - increase

When the resistance in parallel connection across R2 is increased, the amount of current in this shunt circuit will shift toward the other resistors placed in parallel legs, therefore the value of current will be increased in the remaining resistors i.e. R3 & R4.