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Recent questions and answers in Electrostatic Potential and Capacitance

Questions >> CBSE XII >> Physics >> Electrostatic Potential and Capacitance

The electric potential inside a conductivity sphere

answered May 22, 2019 by ray73608

1 answer

Deduce the expression for capacitance of parallel plate capacitor with Dielectric slab. between the

answered Jun 9, 2017 by pady_1

1 answer

 How does capacitor stored energy ? derive an expression for the energy stored in a capacitor.&

answered Jun 8, 2017 by pady_1

1 answer

 How does capacitor stored energy ? derive an expression for the energy stored in a capacitor.&

answered Jun 8, 2017 by pady_1

1 answer

Explain Van't Hoff Factor 

answered Jun 8, 2017 by pady_1

1 answer

Derive an expression for the equivalent capacitance of the parallel combination 

answered Jun 7, 2017 by pady_1

1 answer

Derive an expression for the equivalent capacitance of the parallel combination 

asked Jun 7, 2017 by pady_1

0 answers

Derive an expression for the equivalent capacitance of series combinations .

answered Jun 7, 2017 by pady_1

1 answer

Derive an expression for the equivalent capacitance of series combinations .

answered Jun 7, 2017 by pady_1

1 answer

What will be the capacitance of parallel plate capacitor . 

answered Jun 7, 2017 by pady_1

1 answer

What will be the capacitance of parallel plate capacitor . 

answered Jun 7, 2017 by pady_1

1 answer

What is the behavior of  conductors in the electro static fields ? 

answered Jun 7, 2017 by pady_1

1 answer

What is the behavior of  conductors in the electro static fields ? 

answered Jun 7, 2017 by pady_1

1 answer

Define Electric Flux 

answered Jun 7, 2017 by pady_1

1 answer

Define Electric Flux 

answered Jun 7, 2017 by pady_1

1 answer

What is electrostatic shielding mention its few applications ? 

answered Jun 5, 2017 by pady_1

1 answer

Show that the potential at a point on the equatorial line of an electric dipole is zero. 

answered Jun 5, 2017 by pady_1

1 answer

Show that the potential at a point on the equatorial line of an electric dipole is zero. 

answered Jun 5, 2017 by pady_1

1 answer

derive an expression for the potential at a point along the axial line of a short dipole . 

answered Jun 5, 2017 by pady_1

1 answer

What are non polar molecules ?

answered Jun 2, 2017 by pady_1

1 answer

What are polar molecules

asked Jun 2, 2017 by pady_1

1 answer

Define capacitance give its SI unit ? 

asked May 31, 2017 by pady_1

1 answer

What is the net electric field intensity in the interior of a conductor ? 

answered May 31, 2017 by pady_1

1 answer

A parallel plate capacitor is made of two dielectric blocks in series. One of the blocks has thickness $d_1$ and dielectric constant $k_1$ and the other has thickness $d_2$ and dielectric constant $k_2$ as shown in Fig. This arrangement can be thought as a dielectric slab of thickness $d (= d_1+d_2)$ and effective dielectric constant k. The k is

answered Jan 3, 2017 by meena.p

1 answer

In a region of constant potential

answered Jan 3, 2017 by meena.p

1 answer

A parallel plate capacitor with air between the plates has a capacitance of $8\;pF$ . The separation between the plates is now reduced by half and the space between them is filled with a medium of dielectric constant 5. Calculate the value of capacitance of the capacitor in the second case .

answered Jan 3, 2017 by meena.p

1 answer

Figure shows two identical capacitors $C_1$ and $C_2$ , each of $2 \mu F$ capacitance , connected to a battery of $5\;V$ . initially switch 'S' is closed . After some times S is left open and dielectric slabs of dielectric constant $K=5$ are inserted to fill completely the space between the plates of the two capacitors . How will the charge and potential difference between the plates of the capacitors be affected after the slab are inserted ?

answered Jan 3, 2017 by meena.p

1 answer

A test charge q is moved without a acceleration from A to C along the path from A to B and then from B to C in electric field E as shown in the figure . Calculate the potential difference between A and C

answered Jan 3, 2017 by meena.p

1 answer

Equipotential surfaces

answered Jan 3, 2017 by meena.p

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Consider a uniform electric field in the Z direction . The potential is a constant

answered Jan 3, 2017 by meena.p

1 answer

Two charges $2\mu C$ and $-2 \mu C$ are placed at points A and B, 5cm apart . Depict an equipotential surface of the system

answered Jan 3, 2017 by meena.p

1 answer

An electrical technician requires a capacitance of $2 \mu F$ in a circuit across a potential difference of $1\; kV$. A large number of $1\; \mu F$ capacitors are available to him each of which can withstand a potential difference of not more than $400\; V$. Suggest a possible arrangement that requires the minimum number of capacitors.

answered Jan 3, 2017 by meena.p

1 answer

Three capacitors of capacitances $2pF, 3pF$ and $4pF$ are connected in parallel. Determine the charge on each capacitor if the combination is connected to a $100\; V$ supply.

answered Jan 3, 2017 by meena.p

1 answer

A spherical capacitor consists of two concentric spherical conductors, where outer and inner radii are $r_1$ and $r_2$ respectively as shown in the figure.The capacitance of the spherical capacitor is

answered Jan 3, 2017 by meena.p

1 answer

Three capacitors each of capacitance $9 \;pF$ are connected in series. What is the potential difference across each capacitor if the combination is connected to a $120\; V$ supply?

answered Jan 3, 2017 by meena.p

1 answer

A $900 \;pF$ capacitor is charged by $100\; V$ battery. How much electrostatic energy is stored by the capacitor?

answered Jan 3, 2017 by meena.p

1 answer

A system consisting of two charges $7 \mu C$ and $–2 \mu C$ placed at $(–9 cm, 0, 0)$ and $(9 cm, 0, 0)$ respectively

answered Jan 3, 2017 by meena.p

1 answer

Determine the electrostatic potential energy of a system consisting of two charges $7 \mu C$ and $–2 \mu C$ (and with no external field) placed at $(–9 cm, 0, 0)$ and $(9 cm, 0, 0)$ respectively.

answered Jan 3, 2017 by meena.p

1 answer

Calculate the potential at a point P due to a charge of $4 × 10^{–7}\;C$ located $9\; cm$ away.

answered Jan 3, 2017 by meena.p

1 answer

If one of the two electrons of a $H_2$ molecule is removed, we get a hydrogen molecular ion$ find potential energy of system.

answered Jan 3, 2017 by meena.p

1 answer

Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the ratio of electric fields at the surfaces of the two spheres? Use the result obtained to explain why charge density on the sharp and pointed ends of a conductor is higher than on its flatter portions.

answered Jan 3, 2017 by meena.p

1 answer

In a hydrogen atom, the electron and proton are bound at a distance of about $0.53 \dot{A}$: What is the minimum work required to free the electron, given that its kinetic energy in the orbit is half the magnitude of potential energy obtained ?

answered Jan 2, 2017 by meena.p

1 answer

In a hydrogen atom, the electron and proton are bound at a distance of about 0.53 Å: Estimate the potential energy of the system in eV, taking the zero of the potential energy at infinite separation of the electron from proton.

answered Jan 2, 2017 by meena.p

1 answer

A spherical conducting shell of inner radius $r_1$ and outer radius $r_2$ has a charge Q. Is the electric field inside a cavity (with no charge) zero, even if the shell is not spherical, but has any irregular shape? Explain.

answered Jan 2, 2017 by meena.p

1 answer

Determine the electrostatic potential energy of a system consisting of two charges $7 \mu C$ and $–2 \mu C$ (and with no external field) placed at $(–9 cm, 0, 0)$ and $(9 cm, 0, 0)$ respectively.mple 2.5 (a) Determine the electrostatic potential energy of a system consisting of two charges 7 µC and –2 µC (and with no external field) placed at (–9 cm, 0, 0) and (9 cm, 0, 0) respectively.Suppose that the same system of charges is now placed in an external electric field $E = A (1/r^2); A = 9 \times 10^5 C m^{–2}$. What would the electrostatic energy of the configuration be?

answered Jan 2, 2017 by meena.p

1 answer

Determine the electrostatic potential energy of a system consisting of two charges $7 \mu C$ and $–2\;\mu C$ (and with no external field) placed at $(–9 cm, 0, 0)$ and $(9 cm, 0, 0)$ respectively.

answered Jan 2, 2017 by meena.p

1 answer

A $4 \mu F$ capacitor is charged by a $200\; V$ supply. It is then disconnected from the supply, and is connected to another uncharged $2 \mu F$ capacitor. How much electrostatic energy of the first capacitor is lost in the form of heat and electromagnetic radiation?

answered Jan 2, 2017 by meena.p

1 answer

A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The outer sphere is earthed and the inner sphere is given a charge of $2.5 \mu C$. The space between the concentric spheres is filled with a liquid of dielectric constant $32$. What is the potential of the inner sphere?

answered Jan 2, 2017 by meena.p

1 answer

A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The outer sphere is earthed and the inner sphere is given a charge of $2.5 \mu C$. The space between the concentric spheres is filled with a liquid of dielectric constant $32$. Determine the capacitance of the capacitor.

answered Jan 2, 2017 by meena.p

1 answer

A cylindrical capacitor has two co-axial cylinders of length $15\; cm$ and radii $1.5\; cm$ and $1.4\; cm$. The outer cylinder is earthed and the inner cylinder is given a charge of $3.5\; \mu C$. Determine the capacitance of the system and the potential of the inner cylinder. Neglect end effects (i.e., bending of field lines at the ends).

answered Jan 2, 2017 by meena.p

1 answer

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