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

A hollow metal pipe is held vertically and bar magnet is dropped through it with its length along the axis of the pipe. The acceleration of the falling magnet is ( $$\mathrm{g}=$$ acceleration due to gravity)

A
equal to g.
B
less than $$\mathrm{g}$$.
C
more than g.
D
zero.
2
MHT CET 2023 10th May Evening Shift
+1
-0

Two concentric circular coils having radii $$r_1$$ and $$r_2\left(r_2 << r_1\right)$$ are placed co-axially with centres coinciding. The mutual induction of the arrangement is (Both coils have single turn, $$\mu_0=$$ permeability of free space)

A
$$\frac{\mu_0 \pi r_2^2}{2 r_1}$$
B
$$\frac{\mu_0 \pi r_2}{2 r_1}$$
C
$$\frac{\mu_0 \pi r_2^2}{r_1^2}$$
D
$$\frac{\mu_0 \pi r_2}{r_1}$$
3
MHT CET 2023 10th May Morning Shift
+1
-0

A graph of magnetic flux $$(\phi)$$ versus current (I) is plotted for four inductors A, B, C, D. Larger value of self inductance is for inductor

A
A
B
B
C
C
D
D
4
MHT CET 2023 10th May Morning Shift
+1
-0

A square loop of area $$25 \mathrm{~cm}^2$$ has a resistance of $$10 \Omega$$. This loop is placed in a uniform magnetic field of magnitude $$40 \mathrm{~T}$$. The plane of loop is perpendicular to the magnetic field. The work done in pulling the loop out of the magnetic field slowly and uniformly in one second, will be

A
$$1 \times 10^{-4} \mathrm{~J}$$
B
$$1.0 \times 10^{-3} \mathrm{~J}$$
C
$$5 \times 10^{-3} \mathrm{~J}$$
D
$$2.5 \times 10^{-3} \mathrm{~J}$$
EXAM MAP
Medical
NEET