AIPMT 2002 | Electrostatics Question 66 | Physics

Identical charges ($$-$$q) are placed at each corners of cube of side b then electrostatic potential energy of charge (+q) which is placed at centre of cube will be

$${{ - 4\sqrt 2 {q^2}} \over {\pi {\varepsilon _0}b}}$$

$${{ - 8\sqrt 2 {q^2}} \over {\pi {\varepsilon _0}b}}$$

$${{ - 4\,{q^2}} \over {\sqrt 3 \,\pi {\varepsilon _0}b}}$$

$${{8\sqrt 2 \,{q^2}} \over {4\,\pi {\varepsilon _0}b}}$$

AIPMT 2001

MCQ (Single Correct Answer)

-1

A charge Q$$\mu $$C is placed at the centre of a cube, the flux coming out from each face will be

$${Q \over {6{\varepsilon _0}}} \times {10^{ - 6}}$$

$${Q \over {6{\varepsilon _0}}} \times {10^{ - 3}}$$

$${Q \over {24{\varepsilon _0}}}$$

$${Q \over {8{\varepsilon _0}}}$$

AIPMT 2001

MCQ (Single Correct Answer)

-1

A dipole of dipole moment $$\overrightarrow p $$ is placed in uniform electric field $$\overrightarrow E $$ then torque acting on it is given by

$$\overrightarrow \tau = \overrightarrow p .\overrightarrow E $$

$$\overrightarrow \tau = \overrightarrow p \times \overrightarrow E $$

$$\overrightarrow \tau = \overrightarrow p + \overrightarrow E $$

$$\overrightarrow \tau = \overrightarrow p - \overrightarrow E $$

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