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Q20. In the circuit below, the voltmeter reading is zero. R When the temperature of the thermistor T is increased, the voltmeter reading changes. Which

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Q20. In the circuit below, the voltmeter reading is zero. R When the temperature of the thermistor T is increased, the voltmeter reading changes. Which change to the circuit will restore the voltmeter to zero? A a reduction in the emf of the cell B a reduction in the resistance of P C an increase in the resistance of Q D a reduction in the resistance of R O

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