WB JEE 2023 | Electrostatics Question 11 | Physics

An electric dipole of dipole moment $$\vec{p}$$ is placed at the origin of the co-ordinate system along the $$\mathrm{z}$$-axis. The amount of work required to move a charge '$$\mathrm{q}$$' from the point $$(\mathrm{a}, 0, 0)$$ to the point $$(0,0, a)$$ is,

$$\frac{\mathrm{pq}}{4 \pi \varepsilon_{0} \mathrm{a}}$$

$$\frac{-p q}{4 \pi \varepsilon_{0} \mathrm{a}^{2}}$$

$$\frac{\mathrm{pq}}{4 \pi \varepsilon_{0} \mathrm{a}^{2}}$$

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

The electric potential for an electric field directed parallel to X-axis is shown in the figure. Choose the correct plot of electric field strength.

WB JEE 2022 Physics - Electrostatics Question 13 English

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

Two charges, each equal to $$-$$q are kept at ($$-$$a, 0) and (a, 0). A charge q is placed at the origin. If q is given a small displacement along y direction, the force acting on q is proportional to

$$-$$y

$${1 \over y}$$

$$-$$$${1 \over y}$$

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

WB JEE 2022 Physics - Electrostatics Question 16 English

A neutral conducting solid sphere of radius R has two spherical cavities of radius a and b as shown in the figure. Centre to centre distance between two cavities is c. q_a and q_b charges are placed at the centres of cavities respectively. The force between q_a and q_b is

$${1 \over {4\pi {\varepsilon _0}}}{{{q_a}{q_b}} \over {{c^2}}}$$

$${1 \over {4\pi {\varepsilon _0}}}{q_a}{q_b}\left( {{1 \over {{a^2}}} + {1 \over {{b^2}}}} \right)$$

zero

insufficient data

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