The diagrams below show regions of equipotentials.
A positive charge is moved from A to B in each diagram.
A
In all the four cases the work done is the same.
B
Minimum work is required to move q in figure(I).
C
Maximum work is required to move q in figure (II).
D
Maximum work is required to move q in figure (III)
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
An electric dipole is placed at an angle of 30o with an electric field intensity 2 $$ \times $$ 105 N C$$-$$1. It experiences a torque equal to 4 N m. The charge on the dipole, if the dipole length is 2 cm, is
A
8 mC
B
2 mC
C
5 mC
D
7 $$\mu $$C
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Two identical charged spheres suspended from a common point by two massless strings of lengths $$l$$, are initially at a distance d(d < < $$l$$) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as
A
v $$ \propto $$ x$$-$$1/2
B
v $$ \propto $$ x$$-$$1
C
v $$ \propto $$ x1/2
D
v $$ \propto $$ x
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
If potential (in volts) in a region is expressed as V(x, y, z) = 6xy $$-$$ y + 2yz, the electric field (in N/C) at point (1, 1, 0) is
