MHT CET 2023 10th May Evening Shift | Magnetism and Matter Question 27 | Physics

A solenoid of 500 turns/m is carrying a current of 3 A. Its core is made of iron which has relative permeability 5001. The magnitude of magnetization is

$$4.5 \times 10^6 ~\mathrm{Am}^{-1}$$

$$6.0 \times 10^{-6} \mathrm{~Am}^{-1}$$

$$7.5 \times 10^6 \mathrm{~Am}^{-1}$$

$$9.0 \times 10^6 \mathrm{~Am}^{-1}$$

MHT CET 2023 10th May Morning Shift

MCQ (Single Correct Answer)

-0

According to Curie's law in magnetism, the correct relation is ( $$\mathrm{M}=$$ magnetization in paramagnetic sample, $$\mathrm{B}=$$ applied magnetic field, $$\mathrm{T}=$$ absolute temperature of the material, $$\mathrm{C}=$$ curie's constant)

$$\mathrm{M}=\frac{\mathrm{T}}{\mathrm{CB}}$$

$$\mathrm{M=\frac{C B}{T}}$$

$$\mathrm{C}=\frac{\mathrm{MB}}{\mathrm{T}}$$

$$\mathrm{C}=\frac{\mathrm{T}^2}{\mathrm{MB}}$$

MHT CET 2023 9th May Evening Shift

MCQ (Single Correct Answer)

-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?

$$\frac{M}{L}$$

$$\frac{M}{\pi}$$

$$\frac{\mathrm{M}}{2 \pi}$$

$$\frac{2 \mathrm{M}}{\pi}$$

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

-0

The materials suitable for making electromagnets should have

high retentivity and high coercivity

low retentivity and low coercivity

high retentivity and low coercivity

low retentivity and high coercivity

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