Question

8. Which of these are not properties of
electromagnets?
(i) An increase in current increases its
strength.
(ii) They are permanent magnets.
(iii) They remain magnetised even after
the current is switched off.
(iv) They are of varying shapes and
sizes.
a) (i) and (ii)
c) (i) and (iv)
b)(ii) and (iii)
d) (ii) and (iv)​

Answer 1

The main properties of an Electromagnet are:

(i) An electromagnet is temporary in nature. (ii) An electromagnet is made of a soft iron core. (iii) The magnetic field strength can be changed. (iv) An electromagnet can be easily demagnetized by switching off the current.

option (ii) is ur answer

Answer 2

i think option

( ii ) is right questionn