MHT CET 2024 9th May Evening Shift | Moving Charges and Magnetism Question 22 | Physics

A current carrying circular loop of radius ' $R$ ' and current carrying long straight wire are placed in the same plane. $I_c$ and $I_w$ are the currents through circular loop and long straight wire respectively. The perpendicular distance between centre of the circular loop and wire is ' d '. The magnetic field at the centre of the loop will be zero when separation ' $d$ ' is equal to

$\frac{\mathrm{RI}_w}{\pi \mathrm{I}_{\mathrm{c}}}$

$\frac{\mathrm{RI}_{\mathrm{c}}}{\pi \mathrm{I}_{\mathrm{w}}}$

$\frac{\pi \mathrm{I}_{\mathrm{c}}}{R \mathrm{I}_{\mathrm{w}}}$

$\frac{\pi \mathrm{I}_{\mathrm{w}}}{\mathrm{R}_{\mathrm{c}}}$

MHT CET 2024 9th May Evening Shift

MCQ (Single Correct Answer)

-0

A long solenoid carrying a current produces magnetic field B along its axis. If the number of turns per cm are tripled and the current is made $\left(\frac{1}{4}\right)^{\text {th }}$ then the new value of magnetic field will be

$\frac{B}{3}$

$\frac{\mathrm{B}}{4}$

$\frac{3 B}{4}$

$\frac{2 \mathrm{~B}}{3}$

MHT CET 2024 9th May Evening Shift

MCQ (Single Correct Answer)

-0

The magnetic potential energy stored in certain inductor is $64 \times 10^{-3} \mathrm{~J}$, when the current in the inductor is 80 mA . This inductor is of inductance

0.20 H

2.0 H

20 H

200 H

MHT CET 2024 9th May Morning Shift

MCQ (Single Correct Answer)

-0

The magnetic induction due to an ideal solenoid is independent of

total number of turns of the wire.

length of the solenoid.

radius of the wire.

current carried by the wire.

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