JEE Main 2021 (4 Aug, Shift 2) Physics Q7: Biot-Savart Law

Question

The same current is passed through two identical conducting wires of the same length L. One of them,

\mathrm{w_1}

, is bent in the form of a circular loop of

\mathrm{N_1}

turns while the other wire,

\mathrm{w_2}

, is bent in the form of a circular loop of

\mathrm{N_2}

turns. The ratio of the magnetic fields at the centre of the coils

\mathrm{w_1}

and

\mathrm{w_2}

will be -

Official answer

Option 3

NTA final key.

Accepted Answer

Option 3: $\left(\frac{N_1}{N_2}\right)^2$

Answer

$\frac{N_1}{N_2}$

Answer

$\frac{N_2}{N_1}$

Answer

$\left(\frac{N_1}{N_2}\right)^2$

Answer

$\left(\frac{N_2}{N_1}\right)^2$

JEE Main 4 August 2021, Shift 2, Physics Q7