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

The magnetic flux near the axis and inside the air core solenoid of length $$60 \mathrm{~cm}$$ carrying current '$$\mathrm{I}$$' is $$1.57 \times 10^{-6} \mathrm{~Wb}$$. Its magnetic moment will be $$\left[\mu_0=4 \pi \times 10^{-7}\right.$$, SI unit and crosssectional area is very small as compared to length of solenoid.]

A
$$1 ~\mathrm{Am}^2$$
B
$$0.25 ~\mathrm{Am}^2$$
C
$$0.5 ~\mathrm{Am}^2$$
D
$$0.75 ~\mathrm{Am}^2$$
2
MHT CET 2021 21th September Morning Shift
+1
-0

A charge moves with velocity '$$V$$' through electric field $$(E)$$ as well as magnetic field (B). then the force acting on it is

A
$$q(\vec{B} \times \vec{V})$$
B
$$\mathrm{q}(\overrightarrow{\mathrm{V}} \times \overrightarrow{\mathrm{B}})$$
C
$$q \overrightarrow{\mathrm{E}}+q(\vec{V} \times \vec{B})$$
D
$$q(\vec{E} \times \vec{V})$$
3
MHT CET 2021 21th September Morning Shift
+1
-0

A long solenoid carrying a current produces a magnetic field B along its axis. If the number of turns per $$\mathrm{cm}$$ is doubled and the current is made $$\left(\frac{1}{3}\right)^{\text {rd }}$$ then the new value of the magnetic field will be

A
$$\frac{B}{3}$$
B
3B
C
$$2 \mathrm{~B}$$
D
$$\frac{2 \mathrm{~B}}{3}$$
4
MHT CET 2021 20th September Evening Shift
+1
-0

A metal conductor of length $$1 \mathrm{~m}$$ rotates vertically about one of its ends at an angular velocity of $$5 \mathrm{~rad} / \mathrm{s}$$. If horizontal component of earth's magnetic field is $$0.2 \times 10^{-4} \mathrm{~T}$$, then the e.m.f. developed between the two ends of the conductor is

A
$$5 ~\mu \mathrm{V}$$
B
$$50 \mathrm{~mV}$$
C
$$5 \mathrm{~mV}$$
D
$$50 ~\mu \mathrm{V}$$
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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