1
AIPMT 2005
+4
-1
As per the diagram a point charge +q is placed at the origin O. Work done in taking another point charge $$-$$Q from the point A [coordinates (0, $$a$$)] to another point B

A
zero
B
$$\left( {{{qQ} \over {4\pi {\varepsilon _0}}}{1 \over {{a^2}}}} \right).\sqrt 2 a$$
C
$$\left( {{{ - qQ} \over {4\pi {\varepsilon _0}}}{1 \over {{a^2}}}} \right).\sqrt 2 a$$
D
$$\left( {{{qQ} \over {4\pi {\varepsilon _0}}}{1 \over {{a^2}}}} \right).{a \over {\sqrt 2 }}$$
2
AIPMT 2004
+4
-1
A bullet of mass 2 g is having a charge of 2 $$\mu$$C. Through what potential difference must it be accelerated, starting from rst, to acquire a speed of 10 m/s ?
A
5 kV
B
50 kV
C
5 V
D
50 V
3
AIPMT 2004
+4
-1
An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively
A
2q.E and minimum
B
q.E and p.E
C
zero and minimum
D
q.E and maximum
4
AIPMT 2003
+4
-1
A charge q is located at the centre of a cube. The electric flux through any face is
A
$${{2\pi q} \over {6\left( {4\pi {\varepsilon _0}} \right)}}$$
B
$${{4\pi q} \over {6\left( {4\pi {\varepsilon _0}} \right)}}$$
C
$${{\pi q} \over {6\left( {4\pi {\varepsilon _0}} \right)}}$$
D
$${q \over {6\left( {4\pi {\varepsilon _0}} \right)}}$$
EXAM MAP
Medical
NEET