JEE · NEET Previous Year Question
The electric current in a circular coil of 2 turns produces a magnetic induction at its centre. The coil is unwound and is rewound into a circular coil of 5 turns and the same current produces a magnetic induction at its centre. The ratio of
Topic: JEE PYQ
Answer: B. Full step-by-step solution below.
- A
- B
- C
- D
Correct answer: B
Solution
(b) let the radius of coils is R1 and R2…(i)
from (i)
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