Tell the odd one out. Give proper explanation.
a. Fuse wire, bad conductor, rubber gloves, generator.
b. Voltmeter, Ammeter, galvanometer, thermometer.
c. Loud speaker, microphone, electric motor, magnet.

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Solution

a. The odd one out is generator. It is an electrical device for producing electricity. Fuse wire, bad conductor and rubber gloves have high resistance and are used for blocking electricity. Thus, they can be used as a safety measure against heavy electricity.

b. The odd one out is thermometer. It is an instrument for measuring the temperature of a body. Rest of the three are electrical instruments based on the phenomenon of electromagnetism and are used for measuring some electrical parameters such as current and voltage.

c. The odd one out is magnet. Loud speaker, microphone and electric motor are based on the phenomenon of electromagnetism.

Suggest Corrections

Similar questions

(A) Choose the correct alternative and rewrite the following.

(1) The device used for producing current is called a _______.

(a) Voltmeter

(b) Ammeter

(d) Generator

(2) At the time of short circuit, the current in the circuit _______.

(a) increases

(b) decreases

(d) increases in steps

(3) The direction of the magnetic field around a straight conductor carrying current is given by _______.

(a) Right hand rule

(b) Fleming’s left hand rule

(d) none of these

(B) Say true or false. If false, write the correct sentence

(1) Magnetic poles exist in pairs.

(2) Magnetic field increases as we go away from a magnet.

(3) Magnetic lines of force always cross each other.

(4) Electric generator is used to generate current.

(1) Loudspeaker, microphone, electric motor, bar magnet.

(2) Armature coil, brushes, commutator, direct current.

(3) Fuse, insulating material, rubber shoes, generator.

(4) Voltmeter, ammeter, galvanometer, thermometer.

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