Parallel Circuits - Engineering

Q1:

In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that

A R3 is open

B R1 is open

C R2 is open

D the circuit is operating properly

ANS:A - R3 is open

12 + 15 + 25 = 27
52-27 = 25
So, R3 open.