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

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

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:

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

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

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

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

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

Selenium is a:

Dielectric constant ?_r can be defined as

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:

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

Which of the following is the dielectric constant of metals?

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

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

The number of electrons in one coulomb charge is equal to

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

Photocopier and inkjet printer are the application of:

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

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

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

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

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

The energy stored in the capacitor is:

Due to polarization, electric field E

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

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

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

The constant of proportionality "K" depend upon:

SI unit of electric flux is:

SI unit of permittivity of free space are:

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

The electric flux through closed surface depends upon.

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

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

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

Capacitance of a Capacitor in Vacuum is given by

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

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

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

The electron volt is the unit of

The concept of electric field theory was introduced by

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

The capacitance of a capacitor can be increased by

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

One electron volt is equal to

Relative permittivity for air is:

The electric field created by positive charge is:

Selenium is:

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

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

Electric intensity inside the hollow sphere is:

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

In a charged capacitor, the energy resides in:

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

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

Photocopier and inkjet printer are the application of:

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

The electric field lines are closer where the field is:

The value of ?_o permittivity for free space is:

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;

The product of resistance and capacitance is called

Charge on electron is:

For computation of electric flux, the surface area should be

The product of resistance and capacitance is equal to

Capacitance of a capacitor does not depend upon:

The relation "-?V/?r" represents

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

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

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

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.

The product of resistance and capacitance is

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

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

The toner of the printer is given

If a charged capacitor is connected to earth its charge.

1 ohm x 1 farad is equal to

Capacitance of parallel plate capacitor is:

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

The energy stored in a charged capacitor is given by:

Selenium is a:

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

A charged conductor has charge on its:

One Joule is equal to

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

Electron volt is the unit of

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.

Charge on an electron is:

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

For computation of electric flux, the surface area should be

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

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

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

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