1
MHT CET 2021 21th September Morning Shift
+1
-0

A coil of radius '$$\mathrm{r}$$' is placed on another coil (whose radius is '$$\mathrm{R}$$' and current through it is changing) so that their centres coincide. ( $$R > r$$ ). If both coplanar, then the mutual inductance between them is proportional to

A
$$\frac{R}{r^2}$$
B
$$\frac{r}{R}$$
C
$$\frac{R}{r}$$
D
$$\frac{r^2}{R}$$
2
MHT CET 2021 20th September Evening Shift
+1
-0

A metal wire of length $$2500 \mathrm{~m}$$ is kept in east-west direction, at a height of $$10 \mathrm{~m}$$ from the ground. If it falls freely on the ground then the current induced in the wire is (Resistance of wire $$=25 \sqrt{2} \Omega, \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$$ and Earth's horizontal component of magnetic field $$\left.\mathrm{B}_{\mathrm{H}}=2 \times 10^{-5} \mathrm{~T}\right)$$

A
0.2 A
B
0.02 A
C
0.01 A
D
2 A
3
MHT CET 2021 20th September Morning Shift
+1
-0

Two conducting wire loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop is

A
clockwise
B
anticlockwise
C
in a direction which depends on the ratio of the loop radii.
D
zero
4
MHT CET 2021 20th September Morning Shift
+1
-0

A straight conductor of length 0.6 M is moved with a speed of 10 ms$$^{-1}$$ perpendicular to magnetic field of induction 1.2 weber m$$^{-2}$$. The induced e.m.f. across the conductor is

A
6 V
B
7.2 V
C
0.72 V
D
12 V
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Calculus
Coordinate Geometry
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