Q.1
The sparking between two electrical contacts can be reduced by inserting a
Q.2
The units of volume charge density are
Q.3
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.
Q.4
When a dielectric is placed in an electric field the field strength
Q.5
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
Q.6
Dielectric strength of medium
Q.7
In a capacitive circuit
Q.8
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
Q.9
The presence of an uncharged conductor near a charged one increases the
Q.10
The inverse of capacitance is called
Q.11
A capacitor consists of
Q.12
What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it ?
Q.13
The force between two charges is 120 N. If the distance between the charges is doubled, the force will be
Q.14
What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
Q.15
A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
Q.16
Air capacitors are generally available in the range
Q.17
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
Q.18
The relative permittivity has the following units
Q.19
If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be
Q.20
A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is
Q.21
In a capacitor the electric charge is stored in
Q.22
The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by
Q.23
For making a capacitor, it is better to select a dielectric having
Q.24
The power dissipated in a pure capacitor is
Q.25
The breakdown voltage for paper capacitors is usually
Q.26
Which of the following capacitors is marked for polarity ?
Q.27
An electrolytic capacitor is generally made to provide
Q.28
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is
Q.29
The ability of charged bodies to exert force on 6ne another is attributed to the existence of
Q.30
Electric displacement is a______quantity.
0 h : 0 m : 1 s