1
AIPMT 2002
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+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 2002
MCQ (Single Correct Answer)
+4
-1
A capacitor of capacity C1 charged upto V volt and then connected to an uncharged capacitor of capacity C2. The final potential difference across each will be
A
$${{{C_1}V} \over {{C_1} + {C_2}}}$$
B
$${{{C_2}V} \over {{C_1} + {C_2}}}$$
C
$$\left( {1 - {{{C_2}} \over {{C_1}}}} \right)V$$
D
$$\left( {1 + {{{C_2}} \over {{C_1}}}} \right)$$
4
AIPMT 2001
MCQ (Single Correct Answer)
+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
$$\overrightarrow \tau = \overrightarrow p - \overrightarrow E $$
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