Describe with the aid of a diagram some form of a fuse which is used in the electric lighting circuit of a house. Give two reasons why a fuse must not be replaced by an ordinary copper wire.

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Solution

The most common fuse arrangement is shown in the above figure. In this fuse arrangement the fuse wire is stretched between the two metallic terminals $T_{1}$ and $T_{2}$ in a porcelain holder. This holder fits into a porcelain socket having two metallic terminals to each of which the live wire of the circuit is connected.
Copper has very low resistivity and high melting point. Thus, fuse must not be replaced with a copper wire because by doing so the purpose of using a fuse will be compromised.

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Question 11
An electrician is carrying out some repairs in your house. He wants to replace a fuse with a piece of wire. Would you agree? Give reasons for your response.

Describe with the aid of a diagram some form of a fuse which is used in the electric lighting circuit of a house. Give two reasons why a fuse must not be replaced by an ordinary copper wire.

Q. An electrician is carrying out some repairs in your house. He wants to replace a fuse with a piece of wire. Would you agree? Give reasons for your response.

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Electric Circuit

Standard VIII Physics

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