Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?

Related Mcqs:

1. When a dielectric is placed in an electric field the field strength____________?

   A. decreases
   B. increases
   C. reduces to zero
   D. remain unchanged

2. Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?

   A. decrease
   B. increase
   C. remain constant
   D. depends upon composition of dielectric

3. Which of the following material has least value of dielectric constant ?

   A. Ceramics
   B. Oil
   C. Glass
   D. Paper

4. The value of dielectric constant for vacuum is taken as____________?

   A. zero
   B. 1
   C. 4
   D. 10

5. What will happen to an insulating medium if voltage more than the breakdown voltage is applied on it__________ ?

   A. It will become magnetic
   B. It will melt
   C. It will get punctured or cracked
   D. Its molecular structure will get changed

6. The dielectric constant (relative permittivity) of glass is given by___________?

   A. 0.1 to 0.4
   B. 0.5 to 1.0
   C. 2.0 to 4.0
   D. 5 to 100

7. Dielectric constant for mica is nearly_____________?

   A. 200
   B. 100
   C. 3 to 8
   D. 1 to 2

8. A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______?

   A. Ceramic capacitor
   B. Mica capacitor
   C. Both will have identical value of capacitance
   D. It depends on applied voltage

9. Which of the following materials has the highest value of dielectric constant___________?

   A. Glass
   B. Vacuum
   C. Ceramics
   D. Oil

10. 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

    A. 37, initial
    B. 62, initial
    C. 62, final
    D. 37, final