WorksheetsElectrostatics
Total questions: 20
Worksheet time: 10mins
Two identical point charges of
magnitude –q are fixed as shown in the
figure below. A third charge +q is placed
midway between the two charges at
the point P. Suppose this charge +q is
displaced a small distance from the
point P in the directions indicated
by the arrows, in which direction(s)
will +q be stable with respect to the
displacement?
A1 and A2
B1 and B2
(A1 and A2 )and (B1 and B2)
No stable
Which charge configuration produces
a uniform electric field?
point charge
uniformly charged infinite line
uniformly charged infinite plane
uniformly charged spherical shell
1/5
25/11
5
11/25
An electric dipole is placed at an
alignment angle of 30o with an electric
field of 2 × 105 N C–1. It experiences a
torque equal to 8 N m. The charge on
the dipole if the dipole length is 1 cm is
4 mC
8 mC
5 mC
7 mC
Four Gaussian surfaces are given below
with charges inside each Gaussian
surface. Rank the electric flux through
each Gaussian surface in increasing
order.
D < C < B < A
A < B = C < D
C < A = B < D
D > C > B > A
The total electric flux for the following
closed surface which is kept inside
water
Two identical conducting balls having positive charges q1 and q2 are separated by a centre to centre distance r. If they are made to touch each other and then separated to the same distance, the force between them will be
less than before
same as before
more than before
zero
A thin conducting spherical shell of radius R has a charge Q which is uniformly distributed on its surface. The correct plot for electrostatic potential due to this spherical shell is
a
b
c
d
Two points A and B are maintained at a potential of 7 V and -4 V respectively. The work done in moving 50 electrons from A to B is
8.80 × 10–17 J
-8.80 × 10–17 J
4.40 × 10–17 J
5.80 × 10–17
If voltage applied on a capacitor is increased from V to 2V, choose the correct conclusion.
Q remains the same, C is doubled
Q is doubled, C doubled
C remains same, Q doubled
Both Q and C remain same
A parallel plate capacitor stores a charge Q at a voltage V. Suppose the area of the parallel plate capacitor and the distance between the plates are each doubled then which is the quantity that will change?
Capacitance
Charge
Voltage
Energy density
Three capacitors are connected in triangle as shown in the figure. The equivalent capacitance between the points A and C is
1 microfarad
2 microfarad
3microfarad
(1/4) microfarad
Two metallic spheres of radii 1 cm and 3 cm are given charges of –1 × 10–2 C and 5 × 10–2 C respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is
3 × 10–2 C
4 × 10–2 C
1 × 10–2 C
2 × 10–2 C
Rank the electrostatic potential energies for the given system of charges in increasing order.
1 = 4 < 2 < 3
2 = 4 < 3 < 1
2 = 3 < 1 < 4
3 < 1 < 2 < 4
An electric field E = 10 x i^ exists in a certain region of space. Then the potential difference V = Vo – VA, where Vo is the potential at the origin and VA is the potential at x = 2 m is:
10 V
-20 V
+20 V
-10 V
Workdone in moving a positive charge on an equipotential surface is_________
Finite and positive
Zero
Infinite
Finite and negative
How many electrons will have a charge of one coulomb?
6.25 x 1018
6.25 x 1019
1.6x 1018
1.6 x 10 19
What do you call the process of charging a conductor by bringing it near another charged object?
Polarization
Induction
Neutralization
Friction
What can you do to increase the value of k in Coulomb's law?
Increase the Force
Increase the distance
Decrease the charge
Nothing can be done to change K : it is a constant
Direction of electric field at a point on the equatorial line due to an electric dipole is
Parallel to the axis of the dipole and the direction of the dipole moment
Parallel to the axis of the dipole and opposite to the direction of the Dipole movement
Parallel to the equotorial axis of the dipole and the direction of the dipole moment
None of these
