MHT CET 2021 24th September Evening Shift | Moving Charges and Magnetism Question 70 | Physics

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]

$$10^{-3}$$ T

$$2\pi\times10^{-3}$$ T

$$4\pi\times10^{-3}$$ T

$$8\pi\times10^{-3}$$ T

MHT CET 2021 24th September Evening Shift

MCQ (Single Correct Answer)

-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

$$\omega$$ and q

$$\omega$$ and m

q and m

$$\omega$$, q and m

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

-0

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

area of loop

number of turns in the loop

shape of the loop

strength of the magnetic field

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

-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

$$-2 \mathrm{~F}$$

$$-\mathrm{F}$$

$$-\frac{2 \mathrm{~F}}{3}$$

$$\frac{\mathrm{F}}{3}$$

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