PHYSICS MCQs 2nd Year Chapter No.1 ELECTROSTATICS Test No.2

Dielectric constant ?_r can be defined as

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

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 equal to

For computation of electric flux, the surface area should be

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:

The toner of the printer is given

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

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

The constant of proportionality "K" depend upon:

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

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.

The capacitance of a capacitor can be increased by

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

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

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

The concept of electric field theory was introduced by

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

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

The electric field created by positive charge is:

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

Photocopier and inkjet printer are the application of:

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

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

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

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

In a charged capacitor, the energy resides in:

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

Electric intensity inside the hollow sphere is:

Photocopier and inkjet printer are the application of:

Selenium is a:

Which of the following is the dielectric constant of metals?

The energy stored in the capacitor is:

Charge on an electron is:

For computation of electric flux, the surface area should be

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

Charge on electron is:

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

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

One Joule is equal to

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

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

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

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

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

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

SI unit of electric flux is:

The relation "-?V/?r" represents

Due to polarization, electric field E

Capacitance of a Capacitor in Vacuum is given by

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

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

Selenium is a:

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

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

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

The value of ?_o permittivity for free space is:

Relative permittivity for air is:

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

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

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

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

If a charged capacitor is connected to earth its charge.

The product of resistance and capacitance is called

The energy stored in a charged capacitor 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.

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

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

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

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

Electron volt is the unit of

SI unit of permittivity of free space are:

The product of resistance and capacitance is

A charged conductor has charge on its:

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

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

Capacitance of a capacitor does not depend upon:

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

One electron volt is equal to

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

1 ohm x 1 farad is equal to

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

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

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:

The number of electrons in one coulomb charge is equal to

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

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

Selenium is:

The electric field lines are closer where the field is:

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

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

The electric flux through closed surface depends upon.

The electron volt is the unit of

Capacitance of parallel plate capacitor is: