MHT CET 2025 19th April Morning Shift | Moving Charges and Magnetism Question 9 | Physics

The ratio of angular momentum $L$ of an electron to the magnetic dipole moment $\overrightarrow{\mathrm{m}}_{\text {orb }}$ is ( ' $m$ ' is mass of electron, ' $e$ ' is charge on electron)

$\frac{\mathrm{e}}{\mathrm{m}}$

$\frac{2 m}{e}$

$\frac{\mathrm{e}}{2 \mathrm{~m}}$

$\frac{\mathrm{m}}{\mathrm{e}}$

MHT CET 2025 19th April Morning Shift

MCQ (Single Correct Answer)

-0

Two long straight wires A and B carrying equal current 'I' were kept parallel to each other at distance ' $d$ ' apart. Magnitude of magnetic force experienced by length $L$ of wire $A$ is ' $F$ '. If the distance between the wires is made half and currents are doubled, force $F_2$ on length $L$ of wire $A$ will be

MHT CET 2024 16th May Evening Shift

MCQ (Single Correct Answer)

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An arc of a circle of radius ' $R$ ' subtends an angle $\frac{\pi}{2}$ at the centre. It carries a current $I$. The magnetic field at the centre will be ( $\mu_0=$ permeability of free space)

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

$\frac{\mu_0 I}{8 R}$

$\frac{\mu_0 I}{4 R}$

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

MHT CET 2024 16th May Evening Shift

MCQ (Single Correct Answer)

-0

A current 'I' flows in anticlockwise direction in a circular arc of a wire having $\left(\frac{3}{4}\right)^{\text {th }}$ of circumference of a circle of radius R. The magnetic field ' $B$ ' at the centre of circle is ( $\mu_0=$ permeability of free space)

$\frac{\mu_0 \mathrm{I}}{3 \mathrm{R}}$ in upward direction

$\frac{\mu_0 I}{2 R}$ in downward direction

$\frac{3 \mu_0 \mathrm{I}}{8 \mathrm{R}}$ in downward direction

$\frac{3 \mu_0 \mathrm{I}}{8 \mathrm{R}}$ in upward direction

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