KCET 2021 | Moving Charges and Magnetism Question 10 | Physics

A copper rod $$A B$$ of length $$l$$ is rotated about end $$A$$ with a constant angular velocity $$\omega$$. The electric field at a distance $$x$$ from the axis of rotation is

$$\frac{m \omega^2 x}{e}$$

$$\frac{m \omega x}{e}$$

$$\frac{m x}{\omega^2 l}$$

$$\frac{m e}{\omega^2 x}$$

KCET 2021

MCQ (Single Correct Answer)

-0

A strong magnetic field is applied on a stationary electron. Then, the electron

moves in the direction of the field

moves in an opposite direction of the field

remains stationary

starts spinning

KCET 2021

MCQ (Single Correct Answer)

-0

Two parallel wires in free space are $$10 \mathrm{~cm}$$ apart and each carries a current of $$10 \mathrm{~A}$$ in the same direction. The force exerted by one wire on the other [per unit length] is

$$2 \times 10^{-4} \mathrm{~Nm}^{-1}$$ [attractive]

$$2 \times 10^{-7} \mathrm{~Nm}^{-1}$$ [attractive]

$$2 \times 10^{-4} \mathrm{~Nm}^{-1}$$ [repulsive]

$$2 \times 10^{-7} \mathrm{~Nm}^{-1}$$ [repulsive]

KCET 2021

MCQ (Single Correct Answer)

-0

A toroid with thick windings of $$N$$ turns has inner and outer radii $$R_1$$ and $$R_2$$, respectively. If it carries certain steady current $$I$$, the variation of the magnetic field due to the toroid with radial distance is correctly graphed in

KCET 2021 Physics - Moving Charges and Magnetism Question 12 English Option 1

KCET 2021 Physics - Moving Charges and Magnetism Question 12 English Option 2

KCET 2021 Physics - Moving Charges and Magnetism Question 12 English Option 3

KCET 2021 Physics - Moving Charges and Magnetism Question 12 English Option 4

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