Electrostatics questions with answers
106 multiple-choice questions. Open any question for its answer and explanation.
- Dielectric constant for mica is nearly
- Which medium has the least dielectric strength ?
- 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
- Dielectric strength of a material depends on
- When the dielectric is homogeneous,the potential gradient is
- Which of the following capacitor is preferred in case of single phase motor ?
- One volt is the same as
- The absolute permittivity of free space is given by
- Air capacitors are generally available in the range
- . . . . . . . . at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.
- If
- When a dielectric is placed in an electric field the field strength
- The presence of an uncharged conductor near a charged one increases the
- For closer tolerances which of the following capacitors is usually preferred ?
- A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
- The unit of dielectric strength is given by
- A condenser suitable for D.C. only is
- The capacitance between two plates increases with
- Dielectric strength ______ with increasing thickness
- Which of the following materials has the highest value of dielectric constant?
- The force between two charges is 120 N. If the distance between the charges is doubled, the force will be
- A paper capacitor is usually available in the form of
- The breakdown voltage for paper capacitors is usually
- 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