Dielectric strength of a medium is usually expressed in____________?

Related Mcqs:

1. Which medium has the least dielectric strength ____________?

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

2. 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

3. Dielectric strength of medium____________?

   A. increases with rise in temperature
   B. increases with moisture content
   C. is same for all insulating materials
   D. none of the above

4. Dielectric strength of a material depends on_____________?

   A. moisture content
   B. temperature
   C. thickness
   D. all of the above
   E. none of the above

5. The unit of dielectric strength is given by___________?

   A. V/m
   B. V2/m
   C. m/V
   D. m/V2

6. Dielectric strength _________ with increasing thickness

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

7. Dielectric strength of mica is___________?

   A. 10 to 20 kV/mm
   B. 30 to 50 kV/mm
   C. 50 to 200 kV/mm
   D. 300 to 500 kV/mm

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

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

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

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

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