The value of dielectric constant for vacuum is taken as____________?

Related Mcqs:

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

   A. 50
   B. 100
   C. 150
   D. 200

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 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

5. Dielectric constant for mica is nearly_____________?

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

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

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

7. The dissipation factor of a good dielectric is of the order of____________?

   A. 0.0002
   B. 0.002
   C. 0.02
   D. 0.2

8. Which medium has the least dielectric strength ____________?

   A. Paraffin wax
   B. Quartz
   C. Glass
   D. Air

9. Dielectric strength _________ with increasing thickness

   A. increases
   B. decreases
   C. remains unaltered
   D. none of the above

10. When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will______________?

    A. remain uncharged
    B. decrease
    C. increase
    D. become zero