Question

asure potential difference.
IV. Give reasons:
1. Why does a fuse wire have a very low melting point?
2. Why are electromagnets called temporary magnets?
3. Why is earthing of electrical appliances a must?
4. Air is not filled in an electric bulb?​

Answer 1

Answer:

Why does a fuse wire have a very low melting point?

answer:- A fuse wire should have high resistance and low melting point. So that it prevents current higher than the prescribed value to pass . Low melting point will let it to break when high current passes through it because of the heat generated.

answer.2:- An Electromagnet is called as a temporary magnet, because electromagnet iade up of insulated copper wire wrapped around so iron, which allows current in it and at that moment iron gains its magnetic properties and when the current is switched off then there will be no flow of current and hence iron looses its ...

answer.3:- Protection against electrical overload. One of the most important reasons for grounding electrical currents is that it protects your appliances, your home and everyone in it from surges in electricity

answer.4:-Protection against electrical overload. One of the most important reasons for grounding electrical currents is that it protects your appliances, your home and everyone in it from surges in electricity

Pls mark it as brilliant!