If a charged body A attracts a body B, and B repels a third body C, and C in tur

Question

If a charged body A attracts a body B, and B repels a third body C, and C in turn attracts a fourth body D, what would be the force between A and D, attractive or repulsive?__________ When two or more capacitors are connected in series the resulting (equivalent) capacitance is always: (Select) (a)_____ smaller than each of them (b)_____ bigger than each of them. (c)______ an intermediate value results (d)______ cannot know Four equal charges, two positive and two negative, are placed at the comers of a square as shown in the diagram below. At the center of the square: (a) The net E field would be: zero_____; or non-zero____ (Suggested: draw arrows for each field at the center) (b) Likewise, at the center, the net potential V would be: zero_____; or not-zero______ Two point charges at a distance r_o from each other attract with a Coulomb force F_o, What would be the new force if the distance between the charges is made 3 times bigger? (a) F_0/3 (b) F_0/9 (c) 3F_0 (d) 9F_0

Explanation / Answer

1. Repulsive

2. Smaller than each of them

3. The net electric field is zero and potential is zero at the centre of the square.

4. Option b) is correct. F inversly proportional to r2

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