Draw the pattern of magnetic field lines through and around a current carrying solenoid.

Question

(i) Draw the pattern of magnetic field lines through and around a current carrying solenoid. What does the magnetic field pattern inside the solenoid indicate? 

(ii) How can this principle be utilised to make an electromagnet? 

(iii) State two ways by which strength of this electromagnet can be increased.

Answer 1

Magnetic field pattern inside the solenoid indicates that the magnetic field is same at all points inside the solenoid.

(ii) This principle is utilised to magnetise a piece of magnetic material like soft iron when placed inside the coil. 

(iii) Ways to strengthen this electromagnet: 

(a) Increase the amount of electric current through it. 

(b) Increase the number of turns of coil.