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QAIPMT-2003-Ph-2742: NEET 2003 Physics - Class 12 AIPMT-2003-Ph-2742 Solution: A long solenoid carrying a current produces a magnetic field B…
A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is
Multiple Choice Options
- A B/2
- B B
- C 2B
- D 4B
Step-by-Step Verified Solution
Magnetic field induction at point inside the solenoid of length l, having n turns per unit length carrying current i is given by
B = _ 0 ni
If i _ doubled, n _ halved then B _ remains same.