The minimum value of potential gradient in a cable occurs in____________?

Related Mcqs:

1. A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is____________?

   A. 62 x 105 V/m
   B. 72 x 105 V/m
   C. 82 x 105 V/m
   D. 92 x 105 V/m

2. In a cable capacitor, voltage gradient is maximum at the surface of the______________?

   A. earth
   B. conduction
   C. sheath
   D. insulator

3. at a point is equal to the negative potential gradient at that point?

   A. Electric intensity
   B. Electric flux
   C. Magnetic flux
   D. Magnetic flux density

4. The potential gradient across the material of low permittivity is than across the material of high permittivity?

   A. smaller
   B. greater
   C. both (A) and (B)
   D. none of the above

5. When the dielectric is homogeneous,the potential gradient is_____________?

   A. uniform
   B. non-uniform
   C. zero
   D. any of the above

6. In a capacitor the electric charge is stored in____________?

   A. metal plates
   B. dielectric
   C. both (A) and (B)
   D. none of the above

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

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

8. Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is______________?

   A. 0.56 x 1015 m/s2
   B. 1.5 x 1015 m/s2
   C. 1.6 x 1015 m/s2
   D. 1.76 x 1015 m/s2

9. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is__________?

   A. 50 joules
   B. 150 joules
   C. 200 joules
   D. 250 joules

10. A 5 μF capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is____________?

    A. 2.5 x 10-8 C
    B. 10-5 C
    C. 103 C
    D. 4 x 103 C