AP Physics 1 Question 280: Answer and Explanation
Use your browser's back button to return to your test results.
7. What is the current through the 8 Ω resistor in the circuit shown above?
- A. 0.5 A
- B. 1.0 A
- C. 1.5 A
- D. 3.0 A
Correct Answer: D
Since points a and b are grounded, they're at the same potential (call it zero).
Traveling from b to a across the battery, the potential increases by 24 V, so it must decrease by 24 V across the 8 Ω resistor as you reach point a. Thus, I = V/R = (24 V)/(8 Ω) = 3 A.