Question

We, all have bought a fuse for our household. Ever wondered what the rating in the fuse actually means? Suppose you bought a fuse of rating 12, then it means that:

• A. It has a resistance of 12
• B. It will burn off if current exceed 12 A
• C. It will work only if current reaches above 12 A
• D. It will work only for 12 hours from first use

Answer 1

The correct option is B

It will burn off if current exceed 12 A

Fuse works to protect our devices from excessive flow of current. If current exceeds the rating amount the fuse burns and breaks the connection of power supply to the device, thereby protecting the device from damage.