H2P-385
Electrical power
H2 Physics · JC 2 · Medium · Electrical power
Each resistor in a circuit has a maximum safe power rating of 0.40 W. A 220 Ω resistor is in series with two identical 1500 Ω resistors connected in parallel between points P and Q. What is the maximum potential difference across PQ so that no resistor exceeds its power rating?
- 32 V (approximately)
- 25 V (approximately)
- 39 V (approximately)
- 16 V (approximately)
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.