Consider the arrangement of two fixed point charges, equal in magnitude, shown i

Question

Consider the arrangement of two fixed point charges, equal in magnitude, shown in the figure. Which of the following statements are correct for the initial motion of a third charge if it is released from rest in the vicinity of the two charges shown?

True or False: A negative charge at point c will accelerate toward the lower-right.
True or False: A negative charge at point e will accelerate up.
True or False: A negative charge at point a will accelerate toward the lower-right.
True or False: A positive charge at point b will accelerate up.
True or False: A positive charge at point d will accelerate up.

Explanation / Answer

True: A negative charge at point c will accelerate toward the lower-right. (because near there is a positive charge it will attract)
True: A negative charge at point e will accelerate up. (because near there is a positive charge it will attract)
True: A negative charge at point a will accelerate toward the lower-right.(because near there is a positive charge it will attract)

False: A positive charge at point b will accelerate up. (opposite charge ripple)

False: A positive charge at point d will accelerate up.(opposite charge ripple)

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