Electricity And Magnetism - Study Mode

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[#521] Which of the following instruments is used to measure electric current?

(A) Galvanometer

(B) Rheostat

(C) Voltmeter

(D) Ammeter

Correct Answer

(D) Ammeter

[#522] Which of the following is an example of the conversion of electrical energy into mechanical energy?

(A) electric fan

(B) flashlight

(C) iron

(D) television

Correct Answer

(A) electric fan

[#523] Water is heated with a coil of resistance R connected to domestic supply. The rise of temperature of water will depend on 1. supply voltage. 2. current passing through the coil. 3. time for which voltage is supplied. Select the correct answer

(A) 1, 2 and 3

(B) 1 and 2

(C) Only 1

(D) 2 and 3

Correct Answer

(A) 1, 2 and 3

[#524] What would be the resistance of such a wire in which a 2V potential is applied
the current flowing through the wire is 1 A?

(A) 0.5 ohm

(B) 2 ohm

(C) 20 ohm

(D) 0.02 ohm

Correct Answer

(B) 2 ohm