GEO 2020Q104
Q: A current carrying circular loop having n number of turns per unit length has a current I through it. If the current through it and the number of turns per unit length are doubled, then the magnetic field at the centre of the loop will:
(a)remain same
(b)increase by four times
(c)increase by two times
(d)decrease by two times
Correct Answer: (b)
Detailed explanation coming soon.