1
MHT CET 2023 10th May Evening Shift
+1
-0

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

A
$$4.5 \times 10^6 ~\mathrm{Am}^{-1}$$
B
$$6.0 \times 10^{-6} \mathrm{~Am}^{-1}$$
C
$$7.5 \times 10^6 \mathrm{~Am}^{-1}$$
D
$$9.0 \times 10^6 \mathrm{~Am}^{-1}$$
2
MHT CET 2023 10th May Morning Shift
+1
-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)

A
$$\mathrm{M}=\frac{\mathrm{T}}{\mathrm{CB}}$$
B
$$\mathrm{M=\frac{C B}{T}}$$
C
$$\mathrm{C}=\frac{\mathrm{MB}}{\mathrm{T}}$$
D
$$\mathrm{C}=\frac{\mathrm{T}^2}{\mathrm{MB}}$$
3
MHT CET 2023 9th May Evening Shift
+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
$$\frac{2 \mathrm{M}}{\pi}$$
4
MHT CET 2023 9th May Morning Shift
+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
EXAM MAP
Medical
NEET