Magnetic Effects of Current and Magnetism: JEE Main 2022 Physics question

JEE Main 2022 · 26 Jul, Morning shift · Q7689

JEE Main 202226 Jul, Morning shiftPhysicsMediumMagnetic Effects of Current and Magnetism165× since 2002

\mathrm{B}_{X}

and

\mathrm{B}_{\mathrm{Y}}

are the magnetic fields at the centre of two coils

\mathrm{X}

and

\mathrm{Y}

respectively each carrying equal current. If coil

X

has 200 turns and

20 \mathrm{~cm}

radius and coil

Y

has 400 turns and

20 \mathrm{~cm}

radius, the ratio of

B_{X}

and

B_{Y}

is :