MCQ
The factor by which the capacitance increases from its vacuum value when the dielectric is inserted fully between the plates of a capacitor, is called as:
  • A
    Dielectric.
  • B
    Dielectric constant of the substance.
  • C
    Permittivity.
  • D
    Permiability.

Answer

  1. Dielectric constant of the substance.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Lateral displacement of the emergent ray of light increases with:

How many resistances are used in a Wheatstone bridge?

Two bulbs are in parallel and they together consume 48 W from a battery of 6 V. The resistance of each bulb is

(a) 0.67 Ω

(b) 3.0 Ω

(c) 4.0 Ω

(d) 1.5 Ω

Which impurity is doped in Si to form N-type semi-conductor?

(a) Al

(b) B

(c) As 

(d) None of these

Assertion   :  The magnetic filed at the ends of a very long current carrying solenoid is half of that at the center.

Reason      : If the solenoid is sufficiently long, the field within it is uniform.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

The peak value of voltage of an A.C. circuit is 440 V. Its virtual voltage is :

Electric power is transmitted over long distances through conducting wires at high voltage because

(a) High voltage travels faster

(b) Power loss is large

(c) Power loss is less

(d) Generator produced electrical energy at a very high voltage

Compton effect shows that

(a) X-rays are waves

(b) X-rays have high energy

(c) X-rays can penetrate matter

(d) Photons have momentum

Consider a wheel of a bicycle rolling on a level road at a linear speed v0:

  1. The speed of the particle A is zero.
  2. The speed of B, C and D are all equal to v0.
  3. The speed of C is 2v0.
  4. The speed of B is greater than the speed of O.

Serious draw back of the semiconductor device is

(a) They cannot be used with high voltage

(b) They pollute the environment

(c) They are costly

(d) They do not last for long time