22. The total excess or deficiency of electrons in a body is called the
A. current.
B. voltage.
C. charge.
D. potential gradient.

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23. The charge of an isolated conductor resides
A. at the conductor surface.
B. inside the conductor.
C. partly at the surface and partly inside the conductor.
D. none of the above.

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24. When a charge is given to a conductor,
A. it distributes uniformly all over the surface.
B. it distributes uniformly all over the volume.
C. it distributes on the surface, inversely proportional to the radius of curvature.
D. it stays where it was placed.

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25. Two copper spheres A (hollow) and B (solid) are of same diameter and are charged to the same potential.
A. A will hold more charge in comparison to that of B.
B. A will hold less charge in comparison to that of B.
C. Both of the spheres will hold the same charge.
D. None of the sphere will hold any charge.

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26. The number of 2 pF, 400 V capacitors needed to obtain a capacitance value of 1.511F rated for 1,600 V is
A.12
B.8
C.6
D.4

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27. Two condensers of 20 FtF and 40 FtF capacitance are connected in series across a 90 V supply. After charging, they are removed from the supply and are connected in parallel with positive terminals connected together and similarly the negative terminals. Then the voltage across them will be
A. 90 V.
B. 60 V.
C. 40 V.
D. 20 V.

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28. Joule/Coulomb is the unit of
A. electric field potential.
B. potential.
C. charge.
D. none of the above.

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