Electrostatics Question 690

Question: In fig., two equal positive point charges q1=q2=2.0μC interact with a third point charge Q=4.0μC . The magnitude, as well as direction, of the net force on Q is

Options:

A) 0.23 N in the +x-direction

B) 0.46 N in the +x-direction

C) 0.23 N in the +x-direction

D) 0.46 N in the +x-direction

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Fnet=2|F31|cosα

=2×14πε0×2×4×1012(0.5)2×45=0.46N



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