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...