Find the odd one out:
(i) Voltmeter, ammeter, galvanometer, thermometer.
(ii) Loudspeaker, bar magnet electric motor, microphone.

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Solution

1) Voltmeter, ammeter, and galvanometer are all electrical components and used in the electric circuit for various purposes but the thermometer is the device to measure the temperature.Hence thermometer is the odd one.

2)The bar magnet is the magnet having attractive properties while the other devices use the property of electromagnetism in their working.

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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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