1
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
$$q(\vec{E} \times \vec{V})$$
2
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
$$\frac{2 \mathrm{~B}}{3}$$
3
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
$$50 ~\mu \mathrm{V}$$
4
MHT CET 2021 20th September Evening Shift
+1
-0

Two wires carrying currents $$5 \mathrm{~A}$$ and $$2 \mathrm{~A}$$ are enclosed in a circular loop as shown in the figure. Another wire carrying a current of $$3 \mathrm{~A}$$ is situated outside the loop. The value of $$\oint \overrightarrow{\mathrm{B}} \overrightarrow{\mathrm{d} l}$$ around the loop is ( $$\mu_0=$$ permeability of free space, $$\overrightarrow{\mathrm{d} l}$$ is the length of the element on the Amperion loop)

A
$$4 \mu_0$$
B
$$2 \mu_0$$
C
$$3 \mu_0$$
D
$$\mu_0$$
EXAM MAP
Medical
NEET