Question

Suppose the three resistors in the picture represents a 240 W

Answer 1

Suppose the three resistors in the picture represents a 240 W television , a 720 W straightening iron and a 1440 W hair dryer, Will the fuse melt or blow ?

➪ The fuse will not blow but it will melt because a fuse never blows up.The fuse melts down to break the circuit and stop the extreme flow of current. The wire of a fuse is made up of solder, it has a high melting point so that when heavy current flows through it. The wire melts and breaks the circuit preventing it from catching fire.

Answer 2

A fuse is an electrical safety device which should not blow, which should overheat and melts if current is too high. Its placed in the live wire before the switch. This prevents overheating and catching fire. A fuse have a specific current value for example - 3000 amps. So when choosing a suitable fuse you must use the above minimum value but less than maximum value. For example in a circuit there is 1000W flowing, you should choose more than 1000 amps fuse not less or else, it will melt.