JEE · NEET Previous Year Question
A circular coil carrying a certain current produces a magnetic field at its centre. The coil is now rewound so as to have 3 turns and the same current is passed through it. The new magnetic field at the centre is
Topic: JEE PYQ
Answer: B. Full step-by-step solution below.
- A
- B
- C
- D
Correct answer: B
Solution
(b) for 1 turn.For rewinding the coil in three turns, new radius , number of turns .
New magnetic field
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