Electrostatics Question 663

Question: A system consists of a thin charged wire ring of radius r and a very long uniformly charged wire oriented along the axis of the ring, with one of its ends coinciding with the center of the ring. The total charge on the ring is q, and the linear charge density on the straight wire isλ . The interaction force between the ring and the wire is

Options:

A) λq4πε0r

B) λq22πε0r

C) 22λqπε0r

D) 4λqπε0r

Show Answer

Answer:

Correct Answer: A

Solution:

[a] Net force Fnet=qEx

F=qλ4πε0=λq4πε0r



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