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Physics · Oct / Nov 2020 · Paper 12 · Question 38

5054Action and use of circuit components

A potential divider uses a power supply of voltage 12 V. The resistors X and Y initially have equal resistances. [circuit diagram: 12 V supply, resistor X in series with resistor Y, output voltage across Y] The resistance of X is halved. What is the change in the output voltage?

  1. A–3.0 V
  2. B–2.0 V
  3. C+2.0 V
  4. D+3.0 V

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Correct answer: C. +2.0 V

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