Question

When how much current flows in the fuse, it melts ?
(1) 200 A
(2) 2A
(3) 20 A
(4) 2000 A​

Answer 1

Explanation:

3) 20A is the right answer

Answer 2

Option (3) 20 A

Explanation:

If current higher than 8 A flows through the fuse, it would melt and the circuit gets broken.

So in the given options provided in question 20 A is the closed and the closest greater value than 8 A.

When the fuse wire melts, the circuit has broken the flow of current in the circuit stops simultaneously with the melting of the fuse wire.

When a large current passes through the circuit, the fuse wire melts due to Joule's heating effect.

Joule heating effect describes the process where the energy of an electric current is converted into heat as it flows through a resistance.