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The figure shows the field lines of a positive point charge. The work done by the field in moving a small positive charge from Q to P is:
- Zero
- Positive
- Data insufficient
- Negative
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Solution
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In moving a small positive charge from Q to P, work has to be done by an external agency against the electric field. Therefore, work done by the field is negative.
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The figure shows the field lines of a positive point charge. The work done by the field in moving a small positive charge from Q to P is:
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Q2
The lines of force of the electric field of a positive charge (+q) and a negative charge (−q) are shown in figure (a) and (b) below. Then:-
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