H2P-379
Electrical power
H2 Physics · JC 2 · Medium · Electrical power
A resistor of 150 Ω is in series with two identical 1200 Ω resistors connected in parallel between points P and Q. Each resistor has a maximum safe power rating of 0.40 W. What is the maximum p.d. that can be applied across PQ without any resistor failing?
- 27.5 V
- 22.0 V
- 32.5 V
- 11.0 V
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