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Question

Two connected charges of +q and −q respectively are at a fixed distance AB apart in a non uniform electric field whose lines of force are shown in the figure. The resultant effect on the two charges is
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A
a torque in the plane of the paper and no resultant force
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B
a resultant force in the plane of the paper and no torque
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C
a torque normal to the plane of the paper and no resultant force
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D
a torque normal to the plane of the paper and a resultant force in the plane of the paper
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Solution

The correct option is D a torque normal to the plane of the paper and a resultant force in the plane of the paper
As refer to IMAGE 01:The electric field line show that there is negative charge present nearby the positive charge.
Now, F1>F2 because of non-uniform electric field.
there will be a force in the plane of paper.
Next there will be a torque to align the charge. i.e. to move +ve charge downwards and ve charge upward which will result of a torque normal to the plane of the surface.

954508_598900_ans_f853709caa3f464a8637defa73b398e8.png

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