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_______________?

Related Mcqs:

1. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be________________?

   A. 60 N
   B. 30 N
   C. 40 N
   D. 15 N

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. The electric charge of 100 °C is 13cm apart from another charge 16.9°C electric force between them is_____________?

   A. 9x107N
   B. 900N
   C. 9x105N
   D. 9x106N

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

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

5. If the distance between the two point charges become half then force between them becomes______________?

   A. double
   B. half
   C. four times
   D. remains same

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

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

7. 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

8. A closed surface contains two equal and opposite charges. The net electric flux from the surface will be________________?

   A. negative
   B. positive
   C. zero
   D. data is insufficient

9. A capacitor is a perfect insulator for______________?

   A. direct current
   B. alternating current
   C. both for the direct and alternating current
   D. none of above

10. The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be____________?

    A. 36 x 10fa
    B. 36 x 107 N
    C. 36 x 108 N
    D. 36 x 109 N