Electrostatics questions with answers
106 multiple-choice questions. Open any question for its answer and explanation.
- If a third equal and similar charge is placed between two equal and similar charges, then this third charge will
- Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them
- Which of the following material has least value of dielectric constant ?
- Dielectric strength of a medium is usually expressed in
- The sparking between two electrical contacts can be reduced by inserting a
- 1 volt/meter is same as
- If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will
- Out of the following capacitors of identical rating which one will have the smallest dimensions ?
- If three 15 uF capacitors are connected in series, the net capacitance is
- Which of the following capacitors preferred for high frequency circuits ?
- An electrolytic capacitor is generally made to provide
- 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 unit of capacitance is
- In a cable capacitor, voltage gradient is maximum at the surface of the
- Mica capacitors are characterised by all of the following except
- When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of
- Capacitance increases with
- An electrolytic capacitor can be used for
- 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 mica is
- A capacitance is a circuit component that opposes the change in circuit
- A capacitance of 100 uF is connected in series with a resistance of 8000 ohm. The time constant of the circuit is
- capacitors are used in transistor circuits.
- Which of the following capacitors can be used for temperature compensation ?
- 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