A point P is situated on the axis of an electric dipole at a distance x from its mid-point, the electric potential at point P is proportional to:
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Electrostatic Potential and Capacitance question types
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Electrostatic Potential and Capacitance questions
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The electric potential (V) inside a uniformly charged. spherical shell depends on distance:
Two capacitors whose capacitances are $C _1$ and $C _2$ If they are given equal charges then the ratio of the energies stored in them will be :
View full solution →In what order should three capacitors be connected so that the energy stored in them at the same potential is maximum?
A hollow copper sphere A and a solid sphere B of equal radius are charged with the same potential. The true statement is:
What is called equipotential surface?Draw the diagram of equipotential surface due point positive charge.
Calculate the electric potential at a point located at a distance of $9 \times 10^{-4} m$ due to a charge of $2 \times 10^{-9} C$
View full solution →Write the value of the electric potential at the distance r from the centre of the dipole on the axis of the electric dipole of dipole moment p.
In Millikan's experiment, $-6.4 \times 10^{-19}$ Coulomb charge is found on a charged drop, then write the number of electrons in that charged drop.
View full solution →What will be the work done in bringing a point charge from x to points y and z respectively in the given figure?
If five capacitors $C_1, C_2, C_3, C_4, C_5$ are connected in an electric circuit as shown in the figure, then calculate the equivalent capacitance of this network between point $A$ and point $B$.
View full solution →Two capacitors of capacitance $3 \mu F$ and 4 $\mu F$ are charged separately from a 6 V battery. When the battery is removed, they get connected to each other. In which the negative plate of one capacitor is connected to the positive plate of the other. Calculate the total final energy.
View full solution →A parallel plate capacitor is charged with a potential difference 50 V . Thereafter it is discharged by a resistor for 2 sec , due to which its potential decreases by 10 V . Calculate the portion of energy stored in the capacitor.
X and Y are two parallel plate capacitors, whose plates have the same area and the same distance between them. There is air between the plates of $X$ and a dielectric material of dielectric constant $k=5$ between the plates of $Y$ (in the figure). (a) Calculate the potential diffe-rence between the plates X and Y . (b) What is the ratio of electrical potential energies stored in X and Y ?
View full solution →An uncharged capacitor is connected to a battery. Show that half of the energy used by the battery to charge the capacitor is dissipated as heat.
A parallel plate capacitor is charged to a potential difference V from a direct current source, while there is air between the plates. Without separating the capacitor from the battery, a dielectric medium of dielectric constant K has been filled in place of air. Explain with reasons which of the following changes will occur? Also give explanation of the answers.(i) Potential difference (ii) Electric field between the plates (iii) Capacitance (iv) charge (v) energy.
A small conducting sphere (radius r ) is placed concentrically inside a larger conducting hollow sphere of radius $R$. The big and small spheres are charged with $Q$ and $q(Q>q)$ respectively and kept separate from each other. Calculate the potential difference between the spheres.
View full solution →Write the product of equivalent capacitances when 10 capacitors, each having a capacitance of $10 \mu F$, are connected in series and then parallel connection.
View full solution →What will be the effect on placing a metal foil between the plates of a parallel plate capacitor on its capacitance?
Define polarization.
Draw a graph showing the change in potential corresponding to the change in distance from a point charge. For the charged system shown in the figure, prove that the potential difference between points $A$ and $B$ is
View full solution →Three capacitors each of capacitance 9 pF are connected in series.
(a) What is the total capacitance of the combination?
(b) What is the potential difference across each capacitor if the combination is connected to a 120 V supply? S
(a) What is the total capacitance of the combination?
(b) What is the potential difference across each capacitor if the combination is connected to a 120 V supply? S
What is capacitance of a conductor? What is its unit? Find the formula for capacitance of an isolated spherical conductor. Draw a graph between capacitance and radius. If a spherical conductor is placed in dielectric constant $\epsilon_r$, then what will be the effect on the value of capacitance?###If the area of each conducting plate of a parallel plate capacitor is A and the separation between them is $d$, then express the formula for its capacitance.
View full solution →Write the definition of electric capacitance. A parallel plate capacitor is filled with a medium of dielectric constant K between the plates. Find the expression of its capacitance. Draw the necessary diagram.
Obtain the relation for equivalence in series combination of capacitors. Make a circuit diagram.
Define capacitor. Obtain the relation of equivalence in series combination of capacitors by making a circuit diagram. Write the value of voltage $V_1$ in the given circuit.
View full solution →Define common potential. Find the expression for redistribution of charges and energy loss when capacitors are connected together.
Potential of the Earth is considered ___________.
In a charged capacitor the energy remains in the form of ___________ between the plates of the capacitor.
If an uncharged metal rod is kept near a charged rod, the potential of the first rod will ___________.
Net capacitance in parallel combination of capacitors __________.
When dielectric material is kept between the plates of a capacitor, its capacitance __________.
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