Two particles carrying charges q 1 and q 2 are separated by a distance r and exe

Question

Two particles carrying charges q1 and q2 are separated by a distance r and exert an electric force F E on each other.

Part A

If q1 is doubled, what change must you make to one of the other variables in order to keep the magnitude FE constant? There is more than one answer.

Check all that apply.

Check all that apply.

r should be halved. r should be changed to 2r. q2 should be halved. q2 should be changed to q2/2. r should be doubled. q2 should be doubled. q2 should be changed to 2q2. r should be changed to r/2.

Explanation / Answer

FE = kq1q2/r^2

now q1' = 2q1

kq1q2/r^2 = k2q1q2'/r'^2

q2/r^2 = 2q2'/r'^2

assume distance remain constant

q2 should be halved

if q2 remain constant

r should be sqrt(2)*r

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