1.

Two parallel plate capacitors are arranged perpendicular to the common axis. The separation d between the capacitors is much larger than the separation / between their plates and than their size. The capacitors are charged to q_1 and q_2respectively (figure). Find the force of interaction between the capacitors.

Answer»

`1/2(q_1q_2)/(piepsilon_0d^4)l^2`
`2/3(q_1q_2)/(piepsilon_0d^4)l^2`
`3/2(q_1q_2)/(piepsilon_0d^4)l^2`
`1/3(q_1q_2)/(piepsilon_0d^4)l^2`

ANSWER :C


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