Question

A 30 resistor is connected in series with another resistor and a 6. 0V battery. The current in th

circuit is 0. 12A. A voltmeter is connected across the other resistor.

6. 0V

0. 12 A

3022

What is the reading on the voltmeter?

A

2. 4V

B

3. 6V

с

6. 0V

D

9. 6V

Answer 1

Hi there!

We can begin by calculating the voltage drop across the 30 Ω resistor using the equation:

V = IR
V = Potential Difference (V)

I = Current (A)

R = Resistance (Ω)

Calculate the voltage. Recall that the current is CONSTANT across a series circuit.

V = 0.12 × 30 = 3.6 V

Voltage ADDS UP in a series, so:

Total V = V1 + V2

6 = 3.6 + V2

V2 = 2.4V. The correct answer is A.