1
MHT CET 2021 24th September Evening Shift
+1
-0

A solenoid 2 m long and 4 cm in diameter has 4 layers of windings of 1000 turns each and carries a current of 5 A. What is the magnetic field at its centre along the axis? [$$\mu_0=4\pi\times10^{-7}$$ Wb/Am]

A
$$10^{-3}$$ T
B
$$2\pi\times10^{-3}$$ T
C
$$4\pi\times10^{-3}$$ T
D
$$8\pi\times10^{-3}$$ T
2
MHT CET 2021 24th September Evening Shift
+1
-0

A particle of charge 'q' and mass 'm' moves in a circular orbit of radius 'r' with angular speed '$$\omega$$'. The ratio of the magnitude of its magnetic moment to that of its angular momentum depends on

A
$$\omega$$ and q
B
$$\omega$$ and m
C
q and m
D
$$\omega$$, q and m
3
MHT CET 2021 24th September Morning Shift
+1
-0

A current carrying loop is placed in a uniform magnetic field. The torque acting on the loop does not depend upon

A
area of loop
B
number of turns in the loop
C
shape of the loop
D
strength of the magnetic field
4
MHT CET 2021 24th September Morning Shift
+1
-0

Two long conductors, separated by a distance '$$\mathrm{d}$$' carry currents '$$\mathrm{I}_1$$' and '$$\mathrm{I}_2$$' in the same directions. They exert a force '$$\mathrm{F}$$' on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to '$$3 \mathrm{~d}$$'. The new value of the force between them is

A
$$-2 \mathrm{~F}$$
B
$$-\mathrm{F}$$
C
$$-\frac{2 \mathrm{~F}}{3}$$
D
$$\frac{\mathrm{F}}{3}$$
EXAM MAP
Medical
NEET