Consider the following statements about magnetic field due to a current-carrying solenoid:

(a) The magnetic field inside the solenoid is in the form of parallel straight lines.

(b)The strong magnetic field produced inside the solenoid can be used to magnetise a piece of a magnetic material.
Which of the above statements is/are correct?

Correct option is B

The correct answer is: (b) Both (a) and (b)

Explanation:

• Inside a current-carrying solenoid, the magnetic field lines are straight, parallel, and uniformly spaced, which indicates that the magnetic field is uniform.
→ Hence, statement (a) is correct.

• The strong and uniform magnetic field inside a solenoid is used to magnetise soft iron cores by placing them inside the solenoid. This is how electromagnets are made.
→ Hence, statement (b) is also correct.

Information Booster:

• A solenoid is a long coil of wire with many circular loops.
• Magnetic field inside a solenoid = Strong and Uniform.
• Solenoid + soft iron core → Electromagnet.
• Magnetic field outside a solenoid is weak and non-uniform.