Question 35
Current ElectricityA radio is operated by eight cells each of e.m.f. 2.0 V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is
- A.16 V
- B.12 V
- C.10 V
- D.8 V
Show the answer and explanation
Answer: D (8 V)
Explanation
Six cells push one way (12 V) and the two reversed cells push the other way (4 V), so the net e.m.f. is 12 − 4 = 8 V.