0:8 What is an electromagnet? How does it differ from a permanent magnet?
State three factors on which the strength of an electromagnetic depend
Answers
Explanation:
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field.
WHILE:-
An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it.
Answer:
If a soft iron bar is placed inside the solenoid, and the current switched on, the iron bar becomes temporarily magnetized. This is the principle of the electromagnet.
The strength of an electromagnet depends on:
The strength of the current passing through the coil, the greater the current, the greater the strength. This because the current increases there is more flow of electrons which in turn increases the magnetic field around it.
The number of turns in the coils, the greater the number of coils, the greater the strength. This is because more the number of coils, more uniformity is obtained in the magnetic field and hence it is more stronger.
Whether the core is made up of a soft or hard magnetic material. Soft iron core magnetizes more quickly than hard magnetic materials like steel.
Explanation:
hope it will help you
make it brainlist answer......