Out of the following capacitors of identical rating which one will have the smallest dimensions ?
Out of the following capacitors of identical rating which one will have the smallest dimensions ?
A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
A capacitance is a circuit component that opposes the change in circuit
A capacitance is a circuit component that opposes the change in circuit
The ability of charged bodies to exert force on 6ne another is attributed to the existence of
The ability of charged bodies to exert force on 6ne another is attributed to the existence of
The presence of an uncharged conductor near a charged one increases the
The presence of an uncharged conductor near a charged one increases the
The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by
The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by
Electric field intensity is a quantity
Electric field intensity is a quantity
When the dielectric is homogeneous,the potential gradient is
When the dielectric is homogeneous,the potential gradient is
_______ field is associated with the capacitor.
_______ field is associated with the capacitor.
The bridge used for the measurement of the value of the capacitance is
The bridge used for the measurement of the value of the capacitance is
If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be
If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be
Which of the following capacitors will have the least value of breakdown voltage ?
Which of the following capacitors will have the least value of breakdown voltage ?
Which of the following capacitors preferred for high frequency circuits ?
Which of the following capacitors preferred for high frequency circuits ?
A unit tube of flux is known as tube
A unit tube of flux is known as tube
The sparking between two electrical contacts can be reduced by inserting a
The sparking between two electrical contacts can be reduced by inserting a
The relative permittivity of free space is given by
The relative permittivity of free space is given by
The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as
The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is
A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is
A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is
In a capacitor the electric charge is stored in
In a capacitor the electric charge is stored in
Dielectric strength of medium
Dielectric strength of medium
The absolute permittivity of free space is given by
The absolute permittivity of free space is given by
The ohmmeter reading for a short circuited capacitor is
The ohmmeter reading for a short circuited capacitor is
A field line and an equipotential surface are
A field line and an equipotential surface are
Paper condenser is
Paper condenser is
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
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
One volt is the same as
One volt is the same as
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.
In order to remove static electricity from machinery
In order to remove static electricity from machinery
The power dissipated in a pure capacitor is
The power dissipated in a pure capacitor is
The potential gradient across the material of low permittivity is than across the material of high permittivity.
The potential gradient across the material of low permittivity is than across the material of high permittivity.
The capacitance of a capacitor is not affected by
The capacitance of a capacitor is not affected by
The value of dielectric constant for vacuum is taken as
The value of dielectric constant for vacuum is taken as
1 volt/meter is same as
1 volt/meter is same as
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is
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
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
Dielectric strength of a material depends on
Dielectric strength of a material depends on
capacitors are mainly used for radio frequency tuning.
capacitors are mainly used for radio frequency tuning.
A capacitor consists of two
A capacitor consists of two
The force between two charges is 120 N. If the distance between the charges is doubled, the force will be
The force between two charges is 120 N. If the distance between the charges is doubled, the force will be
The minimum value of potential gradient in a cable occurs in
The minimum value of potential gradient in a cable occurs in
A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is
A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is
is that property of a capacitor which delays any change of voltage across it.
is that property of a capacitor which delays any change of voltage across it.
If three 15 uF capacitors are connected in series, the net capacitance is
If three 15 uF capacitors are connected in series, the net capacitance is
The electric field at a point situated at a distance d from straight charged conductor is
The electric field at a point situated at a distance d from straight charged conductor is
When a dielectric is placed in an electric field the field strength
When a dielectric is placed in an electric field the field strength
Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as
Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as
Which of the following statements is incorrect ?
Which of the following statements is incorrect ?
The unit of capacitance is
The unit of capacitance 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
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
To prevent the generation of static charges on rubber or flat leather
To prevent the generation of static charges on rubber or flat leather
capacitors can be used only for D.C.
capacitors can be used only for D.C.
Which medium has the least dielectric strength ?
Which medium has the least dielectric strength ?
Electric displacement is a______quantity.
Electric displacement is a______quantity.
A region around a stationary electric charge has
A region around a stationary electric charge has
The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be
The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be
A condenser suitable for D.C. only is
A condenser suitable for D.C. only is
A capacitor consists of
A capacitor consists 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
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
The dissipation factor of a good dielectric is of the order of
The dissipation factor of a good dielectric is of the order of
Dielectric strength of mica is
Dielectric strength of mica is
Paper capacitors usually have a tolerance of
Paper capacitors usually have a tolerance of
A paper capacitor is usually available in the form of
A paper capacitor is usually available in the form of
The lines of force due to charged particles are
The lines of force due to charged particles are
In a capacitive circuit
In a capacitive circuit
When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will
When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will
For a good 0.05 uF capacitor ohmmeter reading should
For a good 0.05 uF capacitor ohmmeter reading should
A gang condenser is a
A gang condenser is a
The direction of electric field due +0 positive charge is .
The direction of electric field due +0 positive charge is .
The units of volume charge density are
The units of volume charge density are
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 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 breakdown voltage for paper capacitors is usually
The breakdown voltage for paper capacitors is usually
The total deficiency or excess of electrons in a body is known as
The total deficiency or excess of electrons in a body is known as
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
The relative permittivity has the following units
The relative permittivity has the following units
What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
An electrolytic capacitor is generally made to provide
An electrolytic capacitor is generally made to provide
A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be
A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be
at a point is equal to the negative potential gradient at that point.
at a point is equal to the negative potential gradient at that point.
For making a capacitor, it is better to select a dielectric having
For making a capacitor, it is better to select a dielectric having
The capacitance between two plates increases with
The capacitance between two plates increases with
The inverse of capacitance is called
The inverse of capacitance is called
Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?
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 material has least value of dielectric constant ?
Which of the following material has least value of dielectric constant ?
Which of the following capacitors can be used for temperature compensation ?
Which of the following capacitors can be used for temperature compensation ?
Which of the following capacitors is marked for polarity ?
Which of the following capacitors is marked for polarity ?
capacitors are used for audio frequency and radio frequency coupling and tuning.
capacitors are used for audio frequency and radio frequency coupling and tuning.
Dielectric strength ______ with increasing thickness
Dielectric strength ______ with increasing thickness
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 capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is
Which of the following is not a vector ?
Which of the following is not a vector ?
If three 10 uF capacitors are connected in parallel, the net cararitance is
If three 10 uF capacitors are connected in parallel, the net cararitance is
Which of the following materials has the highest value of dielectric constant?
Which of the following materials has the highest value of dielectric constant?
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 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
Electric intensity at any point in an electric field is equal to the at that point.
Electric intensity at any point in an electric field is equal to the at that point.
For closer tolerances which of the following capacitors is usually preferred ?
For closer tolerances which of the following capacitors is usually preferred ?
What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?
What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?
Which capacitor will be physically smaller for the same ratings ?
Which capacitor will be physically smaller for the same ratings ?
An electrolytic capacitor can be used for
An electrolytic capacitor can be used for
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?
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 of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to ______ percent of its value.
Air capacitors are generally available in the range
Air capacitors are generally available in the range
The dielectric constant (relative permittivity) of glass is given by
The dielectric constant (relative permittivity) of glass is given by
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will
