Physics 9702 · AS & A Level · Kirchhoff's laws

Kirchhoff's laws — practice question

For the circuit diagram shown, the ammeter has a reading of zero. What is the resistance of resistor R?

  • A$100\,\Omega$
  • B$200\,\Omega$
  • C$400\,\Omega$
  • D$600\,\Omega$

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