1
MHT CET 2023 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A solenoid of length $$0.4 \mathrm{~m}$$ and having 500 turns of wire carries a current $$3 \mathrm{~A}$$. A thin coil having 10 turns of wire and radius $$0.1 \mathrm{~m}$$ carries current $$0.4 \mathrm{~A}$$. the torque required to hold the coil in the middle of the solenoid with its axis perpendicular to the axis of the solenoid is $$\left(\mu_0=4 \pi \times 10^{-7}\right.$$ SI units, $$\left.\pi^2=10\right)\left(\sin 90^{\circ}=1\right)$$

A
$$3 \times 10^{-6} \mathrm{~Nm}$$
B
$$12 \times 10^{-6} \mathrm{~Nm}$$
C
$$6 \times 10^{-4} \mathrm{~Nm}$$
D
$$24 \times 10^{-6} \mathrm{~Nm}$$
2
MHT CET 2023 14th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two circular coils made from same wire but radius of $$1^{\text {st }}$$ coil is twice that of $$2^{\text {nd }}$$ coil. If magnetic field at their centres is same then ratio of potential difference applied across them is ($$1^{\text {st }}$$ to $$2^{\text {nd }}$$ coil)

A
2
B
3
C
4
D
6
3
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of magnetic field at the centre of the current carrying circular loop and magnetic moment is $$X$$. When both the current and radius are doubled, then the ratio will be

A
$$2 X$$
B
$$\frac{X}{2}$$
C
$$\frac{X}{4}$$
D
$$\frac{X}{8}$$
4
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A circular current carrying coil has radius $$R$$. The magnetic induction at the centre of the coil is $$B_C$$. The magnetic induction of the coil at a distance $$\sqrt{3} R$$ from the centre along the axis is $$B_A$$. The ratio $$B_A: B_C$$ is

A
$$1: 3$$
B
$$1: 8$$
C
$$8: 1$$
D
$$27: 1$$
MHT CET Subjects
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