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Symbols of Electric Components

The device us...

Question

The device used to close or open an electric circuit is
(a) switch
(b) resistance
(c) ammeter
(d) voltmeter

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Solution

(a) Switch

A switch is a device used to close or open an electric circuit.

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Q. In the circuit shown in figure, an ideal ammeter and an ideal voltmeter are used. When the key is open, the voltmeter reads 1.54 V. When the key is closed, the ammeter reads 1.0 A and the voltmeter reads 1.03 V. The resistance R is

State whether true or false.

A switch is used to close or open an electric circuit.

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Symbols of Electric Components

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