CUET · PHYSICS · PYQ PAPER 2023
There is a solenoid of length 1 m has a radius 1 cm and is made up of 1000 turns, carrying a current of 10 A. The magnitude of the magnetic field inside the solenoid is
- A \( 8\pi \times 10^{-3} \text{ T} \)
- B \( 40\pi \times 10^{-3} \text{ T} \)
- C \( 4\pi \times 10^{-3} \text{ T} \)
- D \( 0.4\pi \times 10^{-3} \text{ T} \)
Answer & Solution
Correct Answer
(C) \( 4\pi \times 10^{-3} \text{ T} \)
Step-by-step Solution
Detailed explanation
\( n = N/L = 1000/1 = 1000 \text{ turns/m} \) \( B = \mu_0 n I = (4\pi \times 10^{-7}) (1000) (10) = 4\pi \times 10^{-3} \text{ T} \)
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