The magnetic moments associated with two closely wound circular c… | JEE Main 2023 Physics PYQ

MCQEasyJEE Main 2023 · 30 January, Shift 1Magnetic Dipole & Bar Magnet

The magnetic moments associated with two closely wound circular coils A and B of radius $r_A = 10 \, cm$ and $r_B = 20 \, cm$ respectively are equal if: (Where $N_A, I_A$ and $N_B, I_B$ are number of turns and current of A and B respectively)

A
$2N_A I_A = N_B I_B$
B
$N_A = 2N_B$
C
$N_A I_A = 4N_B I_B$
D
$4N_A I_A = N_B I_B$

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