Question

Determine the voltage across resistorR2

given: R1=30Ω,R2=75Ω,andI1=0.5A
Someone help me please

Answer 1

15 V

Explanation:

You want the voltage across parallel resistor R2 when the current through 30 Ω parallel resistor R1 is 0.5 A.

Ohm's Law

The voltage across resistor R1 is the product of its resistance and the current through it:

E = IR

E = (0.5A)(30Ω) = 15 V

Parallel circuits

All of the branches of a parallel circuit have the same voltage across them. The voltage across R2 is 15 V.