MHT CET 2024 16th May Morning Shift | Moving Charges and Magnetism Question 3 | Physics

Two coils P and Q each of radius R carry currents I and $\sqrt{8} \mathrm{I}$ respectively in same direction. Those coils are lying in perpendicular planes such that they have a common centre. The magnitude of the magnetic field at the common centre of the two coils is ( $\mu_0=$ permeability of free space)

$\frac{\mu_0 I}{2 R}$

$\frac{3 \mu_0 I}{2 R}$

$\frac{5 \mu_0 I}{2 R}$

$\frac{7 \mu_0 \mathrm{I}}{2 \mathrm{R}}$

MHT CET 2024 15th May Evening Shift

MCQ (Single Correct Answer)

-0

Two concentric circular coils A and B having radii 20 cm and 10 cm respectively lie in the same plane. The current in coil A is 0.5 A in anticlockwise direction. The current in coil B , so that net magnetic field at the common centre is zero, is

$0.5 \mathrm{~A}$ in anticlockwise direction.

0.25 A in anticlockwise direction.

0.25 A in clockwise direction.

0.125 A in clockwise direction.

MHT CET 2024 15th May Evening Shift

MCQ (Single Correct Answer)

-0

An electron is revolving in a circular orbit of radius $r$ in a hydrogen atom. The angular momentum of the electron is L . The relation between dipole moment (m) associated with it, gyromagnetic ratio ( R ) and L is

$\mathrm{m}=-\frac{\mathrm{L}}{\mathrm{R}}$

$\mathrm{m}=-\mathrm{RL}$

$\mathrm{m}=-\mathrm{RL}^2$

$\mathrm{m}=\frac{\mathrm{R}}{\mathrm{L}}$

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