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QAIPM-2002-Ph-2810: NEET 2002 Physics - Class 12 AIPM-2002-Ph-2810 Solution: The magnetic field of given length of wire for single turn coil …
The magnetic field of given length of wire for single turn coil at its centre is B then its value for two turns coil for the same wire is
Multiple Choice Options
- A B/4
- B B/2
- C 4B
- D 2B
Step-by-Step Verified Solution
B 1 = B = _ 0 I 2 R
Further, B 2 = _ 0 ( 2 I ) 2 r
Now 2 _ 2 � r = 2 � R or r = R/2
Hence B 2 = 4 _ _ 0 I 2 R = 4 B