1
KCET 2021
MCQ (Single Correct Answer)
+1
-0

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

A
$$\frac{m \omega^2 x}{e}$$
B
$$\frac{m \omega x}{e}$$
C
$$\frac{m x}{\omega^2 l}$$
D
$$\frac{m e}{\omega^2 x}$$
2
KCET 2021
MCQ (Single Correct Answer)
+1
-0

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

A
moves in the direction of the field
B
moves in an opposite direction of the field
C
remains stationary
D
starts spinning
3
KCET 2021
MCQ (Single Correct Answer)
+1
-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

A
$$2 \times 10^{-4} \mathrm{~Nm}^{-1}$$ [attractive]
B
$$2 \times 10^{-7} \mathrm{~Nm}^{-1}$$ [attractive]
C
$$2 \times 10^{-4} \mathrm{~Nm}^{-1}$$ [repulsive]
D
$$2 \times 10^{-7} \mathrm{~Nm}^{-1}$$ [repulsive]
4
KCET 2021
MCQ (Single Correct Answer)
+1
-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

A
KCET 2021 Physics - Moving Charges and Magnetism Question 1 English Option 1
B
KCET 2021 Physics - Moving Charges and Magnetism Question 1 English Option 2
C
KCET 2021 Physics - Moving Charges and Magnetism Question 1 English Option 3
D
KCET 2021 Physics - Moving Charges and Magnetism Question 1 English Option 4
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