Question

A long solenoid carrying a current produces a magnetic
field B along its axis. If the current is double and the number
of turns per cm is halved, the new value of the magnetic
field is
(a) 4 B (b) B/2
(c) B (d) 2 B

Answer 1

option C is correct..

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Answer 2

Answer:

it is c

Explanation:

magnetic field will same