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1
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A thin rod of length $$L$$ has magnetic moment $$M$$ when magnetised. If rod is bent in a semicircular arc what is magnetic moment in new shape?

A
$$\frac{M}{L}$$
B
$$\frac{M}{\pi}$$
C
$$\frac{\mathrm{M}}{2 \pi}$$
D
$$\frac{2 \mathrm{M}}{\pi}$$
2
MHT CET 2023 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The materials suitable for making electromagnets should have

A
high retentivity and high coercivity
B
low retentivity and low coercivity
C
high retentivity and low coercivity
D
low retentivity and high coercivity
3
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic susceptibility of the material of a rod is 349 and permeability of vacuum $$\mu_0$$ is $$4 \pi \times 10^{-7}$$ SI units. Absolute permeability of the material of the rod in SI units is

A
$$4400 \times 10^{-7}$$
B
$$4200 \times 10^{-7}$$
C
$$4800 \times 10^{-7}$$
D
$$4600 \times 10^{-7}$$
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The relative permeability of iron is 2000. Its absolute permeability in SI unit will be $$\left(\frac{\mu_0}{4 \pi}=10^{-7} \text{SI unit}\right)$$

A
$$8 \pi \times 10^{-7}$$
B
$$4 \pi \times 10^{-5}$$
C
$$8 \pi \times 10^{-4}$$
D
$$\frac{500}{\pi} \times 10^{-7}$$
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