Question

An automobile starter motor has an equivalent resistance of 0.0500Ω and is supplied by a 12.0-V battery with a 0.0100-Ω internal resistance. What is the current to the motor?

a) 0.4 A
b) 240 A
c) 60 A
d) 120 A

Answer 1

The current to the motor is approximately 240 A.

Step-by-step explanation:

To find the current to the motor, we can use Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, the voltage applied to the motor is provided by the battery, which is 12.0V, and the equivalent resistance of the motor is 0.0500Ω. Therefore, the current to the motor can be calculated as:

I = V / R

I = 12.0V / 0.0500Ω

I ≈ 240A

So the correct answer is (b) 240 A.