JEE · NEET Previous Year Question
A closely wound solenoid of long has 5 layers of windings of 400 turns each. The diameter of the solenoid is . If the current carried is , then the magnitude of the magnetic field inside the solenoid near its centre is approximately
Topic: JEE PYQ
Answer: B. Full step-by-step solution below.
- A
- B
- C
- D
Correct answer: B
Solution
(b) Length of Solenoid,Diameter of a solenoid,
Current,
Total number of turns.
Number of turns per unit length
Magnetic field at the center of solenoid
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