Physics-
General
Easy
Question
A small sphere carrying a charge ‘q’ is hanging in between two parallel plates by a string of length L. Time period of pendulum is
. When parallel plates are charged, the time period changes to
. The ratio
is equal to

- None of these
The correct answer is: 

Net downward force 
Þ Effect acceleration 
Hence time period 
Related Questions to study
Physics-
Consider two points 1 and 2 in a region outside a charged sphere. Two points are not very far away from the sphere. If E and V represent the electric field vector and the electric potential, which of the following is not possible
Consider two points 1 and 2 in a region outside a charged sphere. Two points are not very far away from the sphere. If E and V represent the electric field vector and the electric potential, which of the following is not possible
Physics-General
Physics-
In the given figure two tiny conducting balls of identical mass m and identical charge q hang from non-conducting threads of equal length L. Assume that
is so small that
, then for equilibrium x is equal to

In the given figure two tiny conducting balls of identical mass m and identical charge q hang from non-conducting threads of equal length L. Assume that
is so small that
, then for equilibrium x is equal to

Physics-General
Physics-
An ellipsoidal cavity is carved within a perfect conductor. A positive charge
is placed at the centre of the cavity. The points
and
are on the cavity surface as shown in the figure. Then

An ellipsoidal cavity is carved within a perfect conductor. A positive charge
is placed at the centre of the cavity. The points
and
are on the cavity surface as shown in the figure. Then

Physics-General
Physics-
A positively charged ball hangs from a silk thread. We put a positive test charge
at a point and measure
, then it can be predicted that the electric field strength 
A positively charged ball hangs from a silk thread. We put a positive test charge
at a point and measure
, then it can be predicted that the electric field strength 
Physics-General
Physics-
Four identical capacitors are connected as shown in diagram. When a battery of 6 V is connected between A and B, the charge stored is found to be 1.5
. The value of
is

Four identical capacitors are connected as shown in diagram. When a battery of 6 V is connected between A and B, the charge stored is found to be 1.5
. The value of
is

Physics-General
Physics-
Effective capacitance between A and B in the figure shown is (all capacitance are in
)

Effective capacitance between A and B in the figure shown is (all capacitance are in
)

Physics-General
Physics-
Three plates of common surface area A are connected as shown. The effective capacitance will be

Three plates of common surface area A are connected as shown. The effective capacitance will be

Physics-General
Physics-
The charge on 4 mF capacitor in the given circuit is .... in 

The charge on 4 mF capacitor in the given circuit is .... in 

Physics-General
Physics-
All six capacitors shown are identical, Each can withstand maximum 200 volts between its terminals. The maximum voltage that can be safely applied between A and B is

All six capacitors shown are identical, Each can withstand maximum 200 volts between its terminals. The maximum voltage that can be safely applied between A and B is

Physics-General
Physics-
In the figure a potential of + 1200 V is given to point A and point B is earthed, what is the potential at the point P

In the figure a potential of + 1200 V is given to point A and point B is earthed, what is the potential at the point P

Physics-General
Physics-
Three capacitors each of capacity
are to be connected in such a way that the effective capacitance is
. This can be done by
Three capacitors each of capacity
are to be connected in such a way that the effective capacitance is
. This can be done by
Physics-General
Physics-
In the figure shown, the effective capacitance between the points A and B, if each has capacitance C, is

In the figure shown, the effective capacitance between the points A and B, if each has capacitance C, is

Physics-General
Physics-
Four equal capacitors, each of capacity C, are arranged as shown. The effective capacitance between A and B is

Four equal capacitors, each of capacity C, are arranged as shown. The effective capacitance between A and B is

Physics-General
Physics-
In the circuit as shown in the figure the effective capacitance between A and B is

In the circuit as shown in the figure the effective capacitance between A and B is

Physics-General
Physics-
The charge on any one of the
capacitors and
capacitor will be given respectively (in
) as

The charge on any one of the
capacitors and
capacitor will be given respectively (in
) as

Physics-General