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 turn and current of A and B respectively)

Magnetic Effects of Current and Magnetism: JEE Main 2023 Physics question

JEE Main 2023 · 30 Jan, Morning shift · Q7729

JEE Main 202330 Jan, Morning shiftPhysicsMediumMagnetic Effects of Current and Magnetism165× since 2002

The magnetic moments associated with two closely wound circular coils

\mathrm{A}

and

\mathrm{B}

of radius

\mathrm{r}_{\mathrm{A}}=10

\mathrm{cm}

and

\mathrm{r}_{\mathrm{B}}=20 \mathrm{~cm}

respectively are equal if : (Where

\mathrm{N}_{\mathrm{A}}, \mathrm{I}_{\mathrm{A}}

and

\mathrm{N}_{\mathrm{B}}, \mathrm{I}_{\mathrm{B}}

are number of turn and current of

\mathrm{A}

and

\mathrm{B}

respectively)