Physics 9702 · AS & A Level · Potential difference and power

Potential difference and power — practice question

A filament lamp has a resistance of $180\,\Omega$ when the current through it is $500\,\text{mA}$. What power is transformed in the lamp?

  • A$45\,\text{W}$
  • B$50\,\text{W}$
  • C$90\,\text{W}$
  • D$1400\,\text{W}$

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