KCET 2022 | Electrostatics Question 24 | Physics

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

$$2.1 \times 10^5 \mathrm{~V}$$

$$3.6 \times 10^5 \mathrm{~V}$$

$$1.3 \times 10^4 \mathrm{~V}$$

$$3.8 \times 10^4 \mathrm{~V}$$

KCET 2021

MCQ (Single Correct Answer)

-0

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

$$r$$

$$\frac{1}{r}$$

$$\frac{1}{r^2}$$

$$r^2$$

KCET 2021

MCQ (Single Correct Answer)

-0

A $$2 \mathrm{~g}$$ object, located in a region of uniform electric field $$\mathrm{E}=\left(300 \mathrm{NC}^{-1}\right) \hat{\mathbf{i}}$$ carries a charge $$Q$$. The object released from rest at $$x=0$$, has a kinetic energy of $$0.12 \mathrm{~J}$$ at $$x=0.5 \mathrm{~m}$$. Then, $$Q$$ is

$$400 \mu \mathrm{C}$$

$$-400 \mu \mathrm{C}$$

$$800 \mu \mathrm{C}$$

$$-800 \mu \mathrm{C}$$

KCET 2021

MCQ (Single Correct Answer)

-0

Which of the following statements is false in the case of polar molecules?

Centres of positive and negative charges are separated in the absence of external electric field.

Centres of positive and negative charges are separated in the presence of external electric field.

Do not possess permanent dipole moments.

Ionic molecule $$\mathrm{HCl}$$ is the example of polar molecule.

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