If it takes an amount of work W to move two +q point charges from infinity to a distance d apart from each other, then how much work should it take to move three +q point charges from a distance d apart from each other?a) 2W, b) 3W, c) 4W, d) 6W

Explanation:

When two  charge is brought from infinity to a distance d apart each other it take W amount of work.

i.e. Work done is equals to change in Potential Energy of the system

When three Charges are moved from infinity to a distance apart from each other

Work required=Potential Energy of the three charge system

Therefore work required will be three times of original work

33: i think it’s b

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1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.