- The magnetic property is caused due to the flowing current.
- Poles can be interchanged.
- Electromagnets are temporary magnets.
- The magnetic strength cannot be changed.
Choose the correct statements from the below mentioned statements:-
Electromagnets are made of soft iron while permanent magnets are made of steel.
Polarity of an electromagnet can be reversed but polarity of permanent magnet cannot be reversed.
Magnetic field of electromagnet is weak while magnetic field of permanent magnet is very strong
Electromagnet cannot be easily demagnetised while permanent magnet can be easily demagnetised.
Branch of physics which deals with magnetic effects of electric current is called:-
Suppose we have a solenoid with two ends A and B. If current at face A is clockwise while at B is anticlockwise. So, A and B act as:-
A as north pole and B as south pole
B as north pole and A as south pole
Both A and B as north pole
Both A and B as south pole
Which among the following works on the basis of magnetic effect of electric current?
Working of an electromagnet is based on ___.
Heating effect of electric current
Electro-chemical effect of electric current
Magnetic effect of electric current
Chemical effect of electric current
A crane uses a mysterious object ‘X’ to separate magnetic materials from junk. The object ‘X’ is most probably
None of the above
Electromagnets are permanent magnets.
Study the statements given below:
(i) Electromagnets can be made more powerful than ordinary bar magnets.
(ii) Soft iron is easy to magnetize and demagnetize.
(iii) The poles of an electromagnet are not affected by the direction of the current.
Which of the above statements about the electromagnets are correct?
Only (i) and (ii)
Only (ii) and (iii)
(i), (ii) and (iii)
Only (i) and (iii)