A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be_________________?

Related Mcqs:

1. If metallic conductor is charged negatively then its weight______________?

   A. Remains same
   B. First increases then decreases
   C. Decreases then increases
   D. Increases for a while

2. The phenomenon of an uncharged body getting charged merely by the nearness of a charged body is known as____________?

   A. pholoelectric effect
   B. chemical effect
   C. magnetic effect
   D. induction

3. “The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”. The above statement is associated with_______?

   A. Gauss’s law
   B. Kirchhoff s law
   C. Faraday’s law
   D. Lenz’s law

4. 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

5. The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be

   A. R Ω
   B. 2R Ω
   C. 4R Ω
   D. 8R Ω

6. 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

7. The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8C. If the spheres are connected by a copper wire_______________?

   A. charge will flow from A to B
   B. charge will flow from B to A
   C. no flow of charge will occur
   D. both a and b are possible

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 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

10. If a charged rod is brought closer to a gas filled balloon then______________?

    A. Radius decreases
    B. Balloon bursts
    C. Radius increase
    D. Balloon squeezes