Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Moving Charges and Magnetism

Question:

A solenoid of length $0.5 \mathrm{~m}$ and radius $10 \mathrm{~cm}$ has 500 turns. If a current of $5 \mathrm{~A}$ flows through it, the magnetic field produced inside the solenoid will be:

Options:

1.4 × 10-3 T

2.8 × 10-3 T

4.8 × 10-3 T

6.28 × 10-3 T

Correct Answer:

6.28 × 10-3 T

Explanation:

$ B = \mu_0 nI$

$ n = \frac{N}{l} = \frac{500}{0.5} = 1000$

$\Rightarrow B = 4\pi \times 1000 \times 5 = 6.28\times 10^{-3}T$