A) B
B) 2B
C) \[\frac{B}{2}\]
D) None of these
Correct Answer: A
Solution :
Magnetic field induction at point inside the solenoid is given by \[B={{\mu }_{0}}ni\] If i is doubled and n is halved \[B'={{\mu }_{0}}\left( \frac{n}{2} \right)\,(2i)\] \[=\,\,{{\mu }_{0}}ni\] \[\operatorname{B}'=B\]. So, magnetic field will remain same.You need to login to perform this action.
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