H2P-386
Electrical power
H2 Physics · JC 2 · Hard · Electrical power
Two identical resistors of 1500 Ω are connected in parallel and then in series with a 120 Ω resistor between points P and Q. Each resistor has a maximum safe power rating of 0.40 W. What is the maximum p.d. across PQ so that no resistor exceeds its rating?
- 19 V
- 24 V
- 28 V
- 34 V
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