The force between two charges is 120 N. If the distance between the charges is doubled, the force will be

The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be

The lines of force due to charged particles are

The electric field at a point situated at a distance d from straight charged conductor is

The direction of electric field due +0 positive charge is .

A field line and an equipotential surface are

The ability of charged bodies to exert force on 6ne another is attributed to the existence of

If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will

A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is

For making a capacitor, it is better to select a dielectric having

The units of capacitance are

If three 15 uF capacitors are connected in series, the net capacitance is

If three 10 uF capacitors are connected in parallel, the net cararitance is

A dielectric material must be

The capacitance of a capacitor is not affected by

Which of the following is not a vector ?

Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the

If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because

Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?

Which of the following statements is correct ?

The dissipation factor of a good dielectric is of the order of

“The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed”. he above statement is associated with

Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them

For which of the following parameter variation, the capacitance of the capacitor remains unaffected ?

Which of the following statement is true ?

Which of the following expression is correct for electric field strength ?

In a capacitor the electric charge is stored in

Which of the following materials has the highest value of dielectric constant?

Which of the following capacitors will have the least variation ?

Which of the following statements is incorrect ?

Which of the following capacitors has relatively shorter shelf life ?

The sparking between two electrical contacts can be reduced by inserting a

In the case of a lossy capacitor, its series equivalent resistance value will be

The power dissipated in a pure capacitor is

In a capacitive circuit

When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

Capacitance increases with

A capacitor consists of

A gang condenser is a

A paper capacitor is usually available in the form of

Air capacitors are generally available in the range

The unit of capacitance is

A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be

A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?

Energy stored in the electric field of a capacitor C when charged from a D.C source of voltage V is equal to joules

The absolute permittivity of free space is given by

The relative permittivity of free space is given by

Electric field intensity is a quantity

When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of

The capacitor preferred for high frequency circuits is

The capacity of capacitor bank used in power factor correction is expressed in terms of

While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is

If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be

Which capacitor will be physically smaller for the same ratings ?

What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?

A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?

Which of the following material has least value of dielectric constant ?

Which of the following capacitors will have the least value of breakdown voltage ?

Dielectric constant for mica is nearly

The value of dielectric constant for vacuum is taken as

Which of the following capacitors is marked for polarity ?

Which of the following capacitors can be used for temperature compensation ?

Which of the following statements is incorrect ?

Paper capacitors usually have a tolerance of

For closer tolerances which of the following capacitors is usually preferred ?

The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be

The units of volume charge density are

“The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”. he above statement is associated with

Dielectric strength of mica is

The dielectric constant (relative permittivity) of glass is given by

capacitors are mainly used for radio frequency tuning.

capacitors can be used only for D.C.

capacitors are used in transistor circuits.

capacitors are used for audio frequency and radio frequency coupling and tuning.

The inverse of capacitance is called

When the dielectric is homogeneous,the potential gradient is

The potential gradient across the material of low permittivity is than across the material of high permittivity.

________field is associated with the capacitor.

A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is

A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is

Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is

The total deficiency or excess of electrons in a body is known as

The relative permittivity has the following units

The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as

A unit tube of flux is known as tube

The number of Faraday tubes of flux passing through a surface in an electric field is called

The value of E within the field due to a point charge can be found with the help of

at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.

Electric intensity at any point in an electric field is equal to the at that point.

Electric displacement is a______quantity.

at a point is equal to the negative potential gradient at that point.

The unit of dielectric strength is given by

Dielectric strength ______ with increasing thickness

The property of a capacitor to store electricity is called its

is that property of a capacitor which delays any change of voltage across it.

A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is

. In a cable capacitor, voltage gradient is maximum at the surface of the

. The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.

The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value,

. The capacitance of a capacitor is influenced by

. A capacitor consists of two

. Permittivity is expressed in

. Dielectric strength of a material depends on

. What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?

. Which medium has the least dielectric strength ?

. 1 volt/meter is same as

. One volt is the same as

. The capacitance between two plates increases with

. The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by

. The bridge used for the measurement of the value of the capacitance is

. If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is

. Out of the following capacitors of identical rating which one will have the smallest dimensions ?

. An uncharged conductor is placed near a charged conductor, then

. The presence of an uncharged conductor near a charged one increases the

. Paper condenser is

. Mica capacitors are characterised by all of the following except

. A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is

. For a good 0.05 uF capacitor ohmmeter reading should

. The ohmmeter reading for a short circuited capacitor is

. Which of the following statements is correct ?

. Which of the following capacitors preferred for high frequency circuits ?

. An electrolytic capacitor is generally made to provide

. In order to remove static electricity from machinery

. If a third equal and similar charge is placed between two equal and similar charges, then this third charge will

. A region around a stationary electric charge has

. The minimum value of potential gradient in a cable occurs in

. Dielectric strength of medium

. Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as

. Dielectric strength of a medium is usually expressed in

. A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

. Which is the most superior dielectric out of the following ?

. When a dielectric is placed in an electric field the field strength

. To prevent the generation of static charges on rubber or flat leather

. Which of the following capacitor is preferred in case of single phase motor ?

. A capacitance is a circuit component that opposes the change in circuit

. A condenser suitable for D.C. only is

. In a capacitor, the electric charge is stored in