In the following diagram the work done in moving a point charge from point $P$ to point $A$, $B$ and $C$ is respectively as $W_A$, $W_B$ and $W_C$ , then
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(b) According to the figure, there is no other charge. A single charge when moved in a space of no field, does not experience any force. No work is done.
${W_A} = {W_B} = {W_C} = 0$
${W_A} = {W_B} = {W_C} = 0$
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