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

Potential difference and power — practice question

The circuit shown below carries a current $I$ through the resistor $R$. What information must be known to find the value of $I$?

  • Ae.m.f. of the power supply
  • Bresistance of resistor $S$
  • CKirchhoff’s first law
  • DKirchhoff’s second law

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