JEE Main 2024 (Online) 29th January Morning Shift | Electrostatics Question 27 | Physics

Two charges of $$5 Q$$ and $$-2 Q$$ are situated at the points $$(3 a, 0)$$ and $$(-5 a, 0)$$ respectively. The electric flux through a sphere of radius '$$4 a$$' having center at origin is :

$$\frac{2 Q}{\varepsilon_0}$$

$$\frac{7 Q}{\varepsilon_0}$$

$$\frac{3 Q}{\varepsilon_0}$$

$$\frac{5 Q}{\varepsilon_0}$$

JEE Main 2024 (Online) 27th January Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Work done by electric field on moving a positive charge on an equipotential surface is always zero.

Reason (R) : Electric lines of forces are always perpendicular to equipotential surfaces.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both (A) and (R) are correct and (R) is the correct explanation of (A)

(A) is correct but (R) is not correct

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

(A) is not correct but (R) is correct

JEE Main 2024 (Online) 27th January Morning Shift

MCQ (Single Correct Answer)

-1

An electric charge $$10^{-6} \mu \mathrm{C}$$ is placed at origin $$(0,0)$$ $$\mathrm{m}$$ of $$\mathrm{X}-\mathrm{Y}$$ co-ordinate system. Two points $$\mathrm{P}$$ and $$\mathrm{Q}$$ are situated at $$(\sqrt{3}, \sqrt{3}) \mathrm{m}$$ and $$(\sqrt{6}, 0) \mathrm{m}$$ respectively. The potential difference between the points $\mathrm{P}$ and $\mathrm{Q}$ will be :

$$\sqrt{3} \mathrm{~V}$$

$$\sqrt{6} \mathrm{~V}$$

$$0 \mathrm{~V}$$

$$3 \mathrm{~V}$$

JEE Main 2023 (Online) 15th April Morning Shift

MCQ (Single Correct Answer)

-1

The electric field due to a short electric dipole at a large distance $(r)$ from center of dipole on the equatorial plane varies with distance as :

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

$\frac{1}{r}$

$r$

$\frac{1}{r^{3}}$