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

Capacitance of a capacitor does not depend upon:

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

Charge on electron is:

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

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

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

Due to polarization, electric field E

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

The toner of the printer is given

The product of resistance and capacitance is equal to

Relative permittivity for air is:

The capacitance of a capacitor can be increased by

For computation of electric flux, the surface area should be

The value of ?_o permittivity for free space is:

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

The constant of proportionality "K" depend upon:

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

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

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

The energy stored in the capacitor is:

The product of resistance and capacitance is

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

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

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

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

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

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

One Joule is equal to

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

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

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

The electric field created by positive charge is:

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

Electric intensity inside the hollow sphere is:

Which of the following is the dielectric constant of metals?

Capacitance of parallel plate capacitor 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;

A charged conductor has charge on its:

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

The product of resistance and capacitance is called

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

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

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

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

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

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:

1 ohm x 1 farad is equal to

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

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

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:

Charge on an electron is:

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

The product of resistance and capacitance is

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

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

The electric field lines are closer where the field is:

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

Selenium is:

The electric flux through closed surface depends upon.

Selenium is a:

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

Photocopier and inkjet printer are the application of:

The concept of electric field theory was introduced by

SI unit of permittivity of free space are:

SI unit of electric flux is:

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

If a charged capacitor is connected to earth its charge.

Selenium is a:

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

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

Dielectric constant ?_r can be defined as

The energy stored in a charged capacitor is given by:

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

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

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

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

The electron volt is the unit of

The number of electrons in one coulomb charge is equal to

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

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

For computation of electric flux, the surface area should be

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

Capacitance of a Capacitor in Vacuum is given by

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

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

Electron volt is the unit of

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

In a charged capacitor, the energy resides in:

Photocopier and inkjet printer are the application of:

One electron volt is equal to

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

The relation "-?V/?r" represents

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

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.