Electric wires, coils, and machines are made of metals. Which of the following metal cannot be used for them?

copper

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silver

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iron

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sodium

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Solution

The correct option is C sodium
Electric wires, coils and machines are made of hard metals. Sodium is a very soft metal which can be cut through knife hence it cannot use to prepare electric wires, coils and machines.

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Similar questions

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Why are electrical wires not made up of non-metals?

Mark ‘True’ or ‘False’ for the following statements:

(a) Electric current can flow through metals.

(b) Instead of metal wires, a jute string can be used to make a circuit.

Instead of metal wires, a jute string can be used for making electrical circuits.

Give reason why :

(a) copper metal is used for making electric wires.

(b) graphite is used for making electrode in a cell.

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