Physics
Grade-9
Easy
Question
If a wire which carries a current of 6.2 A at normal conditions is subjected to 10 A of current, then
- The fuse wire will melt if its current rating is less than 10 A and hence protects the electrical appliances.
- The fuse wire will melt if its current rating is greater than 10 A hence protects electrical appliances.
- The fuse wire will melt if its current rating is equal to 6.2 A hence protects electrical appliances.
- The fuse wire will melt if its current rating is greater, but near to 6.2 A hence protects electrical appliances.
Hint:
Fuse is a protective device used to disconnect the supply when the current flowing through it exceeds.
The correct answer is: The fuse wire will melt if its current rating is greater, but near to 6.2 A hence protects electrical appliances.
Fuse is a protective device used to disconnect the supply when the current flowing through it exceeds. It is a wire made up of a metal that has low melting point. High current heats and melts it, breaking the circuit.
The fuse wire will melt if its current rating is greater, but near to 6.2 A hence protects electrical appliances.
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