Physics 9702 · AS & A Level · Practical circuits

Practical circuits — practice question

In the circuit shown below, a current $I$ flows through the resistor $R$. What information must be known to determine 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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