Magnetic fields (A-level only)

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Question 77
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The mean power dissipated in a resistor is 115 μW115\text{ }\mu\text{W}115 μW when the root mean square (rms) voltage across the resistor is 210 mV. What is the peak current in the resistor?

5.48×10−4 A5.48 \times 10^{-4}\text{ A}5.48×10−4 A

7.75×10−4 A7.75 \times 10^{-4}\text{ A}7.75×10−4 A

1.09×10−3 A1.09 \times 10^{-3}\text{ A}1.09×10−3 A

1.55×10−3 A1.55 \times 10^{-3}\text{ A}1.55×10−3 A

Magnetic fields (A-level only) Questions

  1. A Level
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