An electron is placed just in the middle between two long fixed line charges of charge density `+lambda` each. The wires are in the xy plane (do not consider gravity) A. The equilibrium of the electron will be stable along x-directionB. the equilibrium of the electron will be stable along y-directionC. the equilibrium of the electron will be unstable along y-directionD. the equilibrium of the electron will be stable along z-direction

An electron is placed just in the middle between two long fixed line c

1.	An electron is placed just in the middle between two long fixed line charges of charge density `+lambda` each. The wires are in the xy plane (do not consider gravity) A. The equilibrium of the electron will be stable along x-directionB. the equilibrium of the electron will be stable along y-directionC. the equilibrium of the electron will be unstable along y-directionD. the equilibrium of the electron will be stable along z-direction
Answer» Correct Answer - D If we displace the electron slightly towards X direction, it will thrown away towards right. so eq. is unstable along x direction. if we displace the electron slightly towards y direction, no Extra force will act. So eql. Is neutral along y axis . If we displace the electron towards z direction, it will be attract and try to come to eql. positron. so eql. is stable along z direction.

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