a State the electrical quantity that has the same value for each of two resistors connected to a battery i When they are in series, ii When they are in parallel b The diagram below shows a circuit with a 1 2 k resistor and a thermistor in series There is no current in the voltmeter Calculate the voltmeter reading when the resistance of the thermistor is 3 6 k c The diagram below shows a fire alarm circuit The circuit is designed to dose switch S and ring bell B if there is a fire Explain the operation of the circuit 1 2 k2 9 0 v V

Question: a. State the electrical quantity that has the same value for each of two resistors connected to a battery i. When they are in series,

a. State the electrical quantity that has the same value for each of two resistors connected to a battery

i. When they are in series,

ii. When they are in parallel.

b. The diagram below shows a circuit with a 1.2 kΩ resistor and a thermistor in series. There is no current in the voltmeter.

1.2 k2 9.0 v V

Calculate the voltmeter reading when the resistance of the thermistor is 3.6 kΩ.

c. The diagram below shows a fire-alarm circuit. The circuit is designed to dose switch S and ring bell B if there is a fire.

Explain the operation of the circuit.

1.2 k2 9.0 v V

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