1
AIPMT 2012 Prelims
+4
-1
An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that the axis of the dipole makes an angle $$\theta$$ with the direction of the field. Assuming that the potential energy of the dipole to be zero when $$\theta$$ = 90o, the torque and the potential energy of the dipole will respectively be
A
pEsin$$\theta$$,  $$-$$pEcos$$\theta$$
B
pEsin$$\theta$$,  $$-$$2pEcos$$\theta$$
C
pEsin$$\theta$$, 2pEcos$$\theta$$
D
pEcos$$\theta$$,  $$-$$pEsin$$\theta$$
2
AIPMT 2012 Prelims
+4
-1
What is the flux through a cube of side $$a$$ if a point charge of q is at one of its corner?
A
$${{2q} \over {{\varepsilon _0}}}$$
B
$${q \over {8{\varepsilon _0}}}$$
C
$${q \over {{\varepsilon _0}}}$$
D
$${q \over {2{\varepsilon _0}}}6{a^2}$$
3
AIPMT 2012 Prelims
+4
-1
Four point charges $$-$$Q, $$-$$q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q for which the potential at the centre of the square is zero is
A
Q = $$-$$q
B
Q = $$- {1 \over q}$$
C
Q = q
D
Q = $${1 \over q}$$
4
AIPMT 2011 Mains
+4
-1
The electric potential V at any point (x, y, z), all in metres in space is given by V = 4x2 volt. The electric field at the point (1, 0, 2) in volt/meter, is
A
8 along negative X-axis
B
8 along positive X-axis
C
16 along negative X-axis
D
16 along positive X-axis
EXAM MAP
Medical
NEET