A capacitor is charged to store energy U. the charging battery is disconnected. An identical capacitor is now connected in parallel to the first capacitor. The energy in each capacitor is

If an insulating material called dielectric is introduced between the plates, the capacitance of capacitor is:

Electric intensity inside the hollow sphere is:

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid-way between them is:

SI unit of electric flux is:

The toner of the printer is given

The product of resistance and capacitance is called

When 10¹⁴ electron are removed from a neutral metal sphere then which of the following is the charge on sphere?

Charge on an electron is:

Electric field and electric potential inside hollow charged conducting sphere are respectively.

The product of resistance and capacitance is

Two point charges are +2C and +6C repel each other with a force of 12N. If a charge of -4C is given to each of these charges, the force now is

A charged conductor has charge on its:

One Joule is equal to

The value of ?_o permittivity for free space is:

Relative permittivity for air is:

If the potential difference across the two plates of a parallel plate capacitor is double then its energy stored in it will be:

A Particle carrying a charge of 2e falls through a potential difference of 3V. The energy acquired by it will be:

The force between two point charges separated by air is 4 N. When separated by a medium of relative permittivity 2, the force between them becomes;

If a metal plate is placed between two point charges then electrostatic force between them.

If 2?F and 4?F capacitors are connected in parallel, the resultant capacitance is

Due to polarization, electric field E

If potential difference across two plates of a parallel plates capacitor is doubled then the energy stored in it will be

The electric field created by positive charge is:

When electron is brought near a - vely charged plate then its electrical P.E.

The number of electrons in one coulomb charge is equal to

The product of resistance and capacitance is

Selenium is a:

A 1?F capacitor is subjected to 4000V potential difference the energy stored in capacitor is:

The concept of electric field theory was introduced by

The electric flux through closed surface depends upon.

An ECG records the_______between points on human skin generated by electric process in the heart:

SI unit of permittivity of free space are:

The number of electrons in one coulomb charge is equal to:

A metallic ball having charge 10^-8C moves from a point A at potential 600V to a point B at zero potential. Which of the following is the change in its K.E.

Doubling the distance between the plates of a capacitor, the capacitance:

Two copper spheres of same radii one hollow and other solid are charged to the same potential then.

The product of resistance and capacitance is equal to

Capacitance of a Capacitor in Vacuum is given by

Selenium is a:

Which one of the following relations for the energy stored in capacitor is not correct?

A parallel plate capacitor with oil between the plate(?_r = 2) has a capacitance "C". If oil is removed then capacitance of capacitor becomes.

An alpha particle is accelerated through potential difference of 10⁶V.Which of the following is its K.E?

Dielectric constant ?_r can be defined as

The unit of Electric intensity other than NC^-1 is:

When dielectric is placed between the plates of capacitor, The value of E between the plates

The capacitance of a capacitor can be increased by

Capacitance of a capacitor does not depend upon:

A charge Q is enclosed in a dielectric of strength K the maximum number of electric lines of force are

Capacitance of parallel plate capacitor is:

If a charged capacitor is connected to earth its charge.

If the separation between the plates of a capacitor is doubled then its capacitance become

If a charged body is moved against the electric field, it will gain:

If 2?F and 4?F capacitors are connected in series, the resultant capacitance is

One electron volt is equal to

When air is replaced by a dielectric medium of relative permittivity ?r, the maximum capacity of the condenser_____

Due to polarization of the dielectric, the capacitance of the capacitor:

A charge Q is divided into two parts q₁ and q₂. The maximum coulomb repulsion between the two parts is obtained when ratio q₁/q₂ is.

Which one of the following can be taken as measure of electric field intensity:

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. Which of the following quantity remain unchanged?

Two charges 1 ?c and 5?c separated by 20cm, the ratio of electrical forces acting on them will be:

4 x 10²⁰ eV energy is required to move a charge of 0.25 C from A to B the potential difference between A and B is

The electric field lines are closer where the field is:

Electron volt is the unit of

Which of the following is not the energy stored between the plates of a condenser?

If a dielectric is placed between the plates of a capacitor, its capacitance

Due to polarization of the dielectric, the electric intensity between the plates of a capacitor:

Charge on electron is:

In a charged capacitor, the energy resides in:

If f₁ and ₂ are forces acting on ?-particle and electron respectively, when

Selenium is:

Three capacitor of 4?F each are to be connected in such a way that the net capacitance is 6?F. Then

If the medium between plates of a capacitor be air or vacuum, then the capacitance of capacitor is:

The constant of proportionality "K" depend upon:

Two charges q₁ and q₂ are placed in vacuum at distance d and force between them is F. If a mentioned of relative permittivity 4 is introduced between them then new force will be:

Special organ called Ampullae of lorenzini that are very sensitive to electric field are found in

The relation "-?V/?r" represents

The Electrostatic force between two charges is 42 N. If we place a dielectric of er.=2.1 between the charges, then the force become equal to:

If time constant in RC circuit is small, the capacitor is charged or discharged

The electron volt is the unit of

The energy stored in the capacitor is:

The work done in bringing a unit positive charge from infinity to that point in an electric field is called:

For computation of electric flux, the surface area should be

The electrostatic force of repulsion between two electrons at a distance 1m is:

Photocopier and inkjet printer are the application of:

Photocopier and inkjet printer are the application of:

The energy stored in a charged capacitor is given by:

The force between two similar unit charges placed one meter apart in air is:

The value of Coulomb's constant (K) in SI units is

For computation of electric flux, the surface area should be

Which of the following is the dielectric constant of metals?

1 ohm x 1 farad is equal to

Which material sheet should be placed between the plates of a parallel plate capacitor in order to increase its capacitance?

Two equal and opposite equal charges separated by small distance are said to make a :

The magnitude of an electric field E, such that an electron placed in it would be experience an electric force equal to its weight, is given by

Time constant is defined as the time during which a capacitor charges to_____ of its equilibrium value.