1
AIPMT 2002
+4
-1
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
A
$${{ - 4\sqrt 2 {q^2}} \over {\pi {\varepsilon _0}b}}$$
B
$${{ - 8\sqrt 2 {q^2}} \over {\pi {\varepsilon _0}b}}$$
C
$${{ - 4\,{q^2}} \over {\sqrt 3 \,\pi {\varepsilon _0}b}}$$
D
$${{8\sqrt 2 \,{q^2}} \over {4\,\pi {\varepsilon _0}b}}$$
2
AIPMT 2002
+4
-1
Some charge is being given to a conductor. Then its potential is
A
maximum at surface
B
maximum at centre
C
remain same throughout the conductor
D
maximum somewhere between surface and centre.
3
AIPMT 2001
+4
-1
A dipole of dipole moment $$\overrightarrow p$$ is placed in uniform electric field $$\overrightarrow E$$ then torque acting on it is given by
A
$$\overrightarrow \tau = \overrightarrow p .\overrightarrow E$$
B
$$\overrightarrow \tau = \overrightarrow p \times \overrightarrow E$$
C
$$\overrightarrow \tau = \overrightarrow p + \overrightarrow E$$
D
$$\overrightarrow \tau = \overrightarrow p - \overrightarrow E$$
4
AIPMT 2001
+4
-1
A charge Q$$\mu$$C is placed at the centre of a cube, the flux coming out from each face will be
A
$${Q \over {6{\varepsilon _0}}} \times {10^{ - 6}}$$
B
$${Q \over {6{\varepsilon _0}}} \times {10^{ - 3}}$$
C
$${Q \over {24{\varepsilon _0}}}$$
D
$${Q \over {8{\varepsilon _0}}}$$
EXAM MAP
Medical
NEET