testing

1 / 3

1).Certain materials when placed inside strong magnetic field gets magnetized and behave like a magnet. when a rod of soft iron is placed inside a solenoid and current is passed, the soft iron rod gets choose one demagnetised magnetised

2 / 3

But if rod is made of hard steels, chromium steel or cobalt and tungsten steel then even if current is made zero, the material retains its magnetism, i.e., it becomes a choose one permanent temporary magnet

3 / 3

A solenoid with soft iron core is called an choose one electromagnet commutator armature .

❮ ❯

Score =
Correct answers: