1
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Magnetic induction produced at the centre of a circular loop of radius ' $R$ ' carrying a current is ' B '. The magnetic moment of the loop is ( $\mu_0=$ permeability of free space)

A
$\frac{\mathrm{BR}^3}{2 \pi \mu_0}$
B
$\frac{2 \pi \mathrm{BR}^3}{\mu_0}$
C
$\frac{\mathrm{BR}^2}{2 \pi \mu_0}$
D
$\frac{2 \pi \mathrm{BR}^2}{\mu_0}$
2
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The strength of magnetic field at a perpendicular distance ' $x$ ' near a long straight conductor carrying current ' I ' is ' B '. The magnetic field at a distance $\frac{x}{3}$ from straight conductor will be

A
$\frac{\mathrm{B}}{3}$
B
 3 B
C
$\frac{\mathrm{B}^2}{9}$
D
$9 \mathrm{~B}^2$
3
MHT CET 2024 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An infinitely long straight conductor carrying current 'I' is bent in a shape as shown in figure. The radius of the circular part of loop is 'r'. The magnetic induction at the centre 'C' is ($\mu=$ permeability of free space)

MHT CET 2024 11th May Evening Shift Physics - Moving Charges and Magnetism Question 8 English

A
Zero
B
$\frac{\mu_0}{4 \pi} \frac{2 I}{r}(1+\pi)$
C
$\frac{\mu_0}{4 \pi} \frac{\mathrm{I}}{\mathrm{r}}(1+\pi)$
D
$\frac{\mu_0}{4 \pi} \frac{2 I}{r}(\pi-1)$
4
MHT CET 2024 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A current carrying circular loop of radius ' $R$ ' and current carrying long straight wire are placed in the same plane. The current through circular loop and long straight wire are ' $I_c$ ' and ' $\mathrm{I}_{\mathrm{w}}$ ' 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

A
$\frac{\mathrm{RI}_{\mathrm{w}}}{\pi \mathrm{I}_{\mathrm{c}}}$
B
$\frac{\mathrm{RI}_{\mathrm{c}}}{\pi \mathrm{I}_{\mathrm{w}}}$
C
$\frac{\pi \mathrm{I}_{\mathrm{c}}}{\mathrm{RI}_{\mathrm{w}}}$
D
$\frac{\pi \mathrm{I}_{\mathrm{w}}}{\mathrm{RI}_{\mathrm{c}}}$
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