### Electrostatics Objectives Part 02

21 . Coulomb’s Law for the force between electric charges most closely resembles with Newton’s Law of gravitation.

22 . A charged oil drop is stationary between a pair of horizontal parallel plates. If the drops carries a charge 3.2 * 10^-10 coulomb and has a mass 1.6 * 10^-19 kg, then the potential difference between the plates is cannot be calculated on the basis of the information given.

23 . A region around a stationary electric charge has electric field.

24 . Inside a hollow spherical conductor electric field is zero.

25 . 1V/m is the same as 1N/C.

26 . One thousand electrons, each of which carries a charge of -1.6 * 10^-12 coulomb are removed from an initially neutral pitch ball. The resulting charge on the pitch ball is 1.6 * 10^-15 C.

28 . When the potential difference across the electric field intensity between the parallel plate air capacitor is doubled, plates is independent of the potential difference.

29 . If small charged drops are combined to give a bigger drop, the rise in potential will be directly proportional to the radius of the bigger drop.

30 . Midway between two equal and similar charges, a third equal and similar charge is placed, then this third charge will remain in stable equilibrium.

31 . One volt is the same as 1J/C.

32 . One farad is the same as 1C/V.

33 . When a dielectric is placed in an electric field, the field strength decreases.

34 . The electric field intensity between the plates of a parallel plate condenser is I. Now if a dielectric medium is introduced between the plates, the strength of electric field will become E/S.

35 . If v,w,q stand for voltage, energy and charge then v can be expressed as v = dw/dq.

36 . The unit of electric energy is KWh.

37 . The potential inside a charged hollow sphere is same as that on the surface.

38 . Electric current density J is defined as I/A.

39 . Two copper spheres A and B are of the same radii. Sphere A is hollow and sphere B is solid. If both spheres are charged to the same potential Both will hold the same charge.

40 . For dielectrics, flux is proportional to potential difference between electrodes.