Question

4-What is the equivalent resistance of this circuit?

( )32 Ω
( )43 Ω
( )48 Ω
( )74 Ω

Answer 1

Step-by-step explanation:

The parallel resistors ( 10 and 40 Ω) have an equivalent resistance of

( 40 * 10 ) / ( 40 + 10 ) = 8 Ω

Then you can add all of the series resistances to find the total resistance

15 + 25 + 8 Ω = 48 Ω

Remember V = IR ....then V/R = I

Current = V/ R = 55 v / 48 Ω = 1.15 A