Question 10 Part A Two objects with charges + q and 2 q are separated by a dista

Question

Question 10

Part A

Two objects with charges +q and 2q are separated by a distance r. You slowly move one of the objects closer to the other so that the distance between them decreases by half. Considering the two objects as the system, which statements are incorrect?

Check all that apply.

_____________________________________

Why is the answer C and D, i.e. the EPE decreasing by half?

The equation I have for

Electrical Potential Energy_initial = k*q* (-2q)/(radius_initial).

EPE_final = (-2k*q^2)/(0.5*radius_initial) = 2*Electrical Potential Energy_Initial

So whats wrong with what I am doing here? Shouldn't it be 2 times, not decreased by half?

A. The magnitude of the electric potential energy doubles. B. The electric potential energy of the system doubles. C. The electric potential energy of the system decreases by half. D. The magnitude of the electric potential energy decreases by half.

Explanation / Answer

EPE is negative here. Suppose -1 becomes -2 then

What do u say about that change.. Obviously it is decreased... The same thing will apply here

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