A 6.0 Ω resistor and a 3.0 Ω resistor are connected in parallel to a 1.5 V battery of negligible internal resistance. What is the current in the 3.0 Ω resistor?
A) 2.0 A
B) 0.50 A
C) 0.25 A
D) 0.17 A
E) 0.75 A

Question

Quizplus · Accepted Answer

Using Ohm's Law, we can find the total current in the circuit:

I = V/R_total = 1.5 V / (6.0 Ω + 3.0 Ω) = 0.25 A

Since the two resistors are in parallel, they each have the same voltage across them (1.5 V). We can use Ohm's Law again to find the current in the 3.0 Ω resistor:

I = V/R = 1.5 V / 3.0 Ω = 0.50 A

Therefore, the current in the 3.0 Ω resistor is 0.50 A, or choice B.

A 60 Ω Resistor and a 3