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1
KCET 2022
MCQ (Single Correct Answer)
+1
-0

A charged particle of mass $$m$$ and charge $$q$$ is released from rest in an uniform electric field E. Neglecting the effect of gravity, the kinetic energy of the charged particle after $$t$$ seconds is

A
$$\frac{E q^2 m}{2 t^2}$$
B
$$\frac{E q m}{t}$$
C
$$\frac{E^2 q^2 t^2}{2 m}$$
D
$$\frac{2 E^2 t^2}{m q}$$
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

The electric field and the potential of an electric dipole vary with distance $$r$$ as

A
$$\frac{1}{r^2}$$ and $$\frac{1}{r}$$
B
$$\frac{1}{r^2}$$ and $$\frac{1}{r^3}$$
C
$$\frac{1}{r^3}$$ and $$\frac{1}{r^2}$$
D
$$\frac{1}{r}$$ and $$\frac{1}{r^2}$$
3
KCET 2022
MCQ (Single Correct Answer)
+1
-0

Two tiny spheres carrying charges $$1.8 \mu \mathrm{C}$$ and $$2.8 \mu \mathrm{C}$$ are located at $$40 \mathrm{~cm}$$ apart. The potential at the mid - point of the line joining the two charges is

A
$$2.1 \times 10^5 \mathrm{~V}$$
B
$$3.6 \times 10^5 \mathrm{~V}$$
C
$$1.3 \times 10^4 \mathrm{~V}$$
D
$$3.8 \times 10^4 \mathrm{~V}$$
4
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Electric field due to infinite, straight uniformly charged wire varies with distance $$r$$ as

A
$$r$$
B
$$\frac{1}{r}$$
C
$$\frac{1}{r^2}$$
D
$$r^2$$
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