1
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-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)

A
$\frac{\mu_0 \mathrm{I}}{3 \mathrm{R}}$ in upward direction
B
$\frac{\mu_0 I}{2 R}$ in downward direction
C
$\frac{3 \mu_0 \mathrm{I}}{8 \mathrm{R}}$ in downward direction
D
$\frac{3 \mu_0 \mathrm{I}}{8 \mathrm{R}}$ in upward direction
2
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic induction along the axis of a toroidal solenoid is independent of

A
number of turns per unit length.
B
current passing through it.
C
radius of the toroidal solenoid.
D
permeability
3
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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)

A
$\frac{\mu_0 I}{2 R}$
B
$\frac{3 \mu_0 I}{2 R}$
C
$\frac{5 \mu_0 I}{2 R}$
D
$\frac{7 \mu_0 \mathrm{I}}{2 \mathrm{R}}$
4
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-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

A
$0.5 \mathrm{~A}$ in anticlockwise direction.
B
0.25 A in anticlockwise direction.
C
0.25 A in clockwise direction.
D
0.125 A in clockwise direction.
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