Which medium has the least dielectric strength ____________?

Related Mcqs:

1. Dielectric strength of a medium is usually expressed in____________?

   A. J/mm
   B. C/m2
   C. kV/mm
   D. N/mm

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

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

9. A dielectric material must be____________?

   A. resistor
   B. insulator
   C. good conductor
   D. semi conductor

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

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