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If there is a single source charge present, then the electric field lines are drawn radially about the charge. If the source charge is positive, then a positive test charge is repelled by it and pushed away towards infinity. If the source charge is negative, then a positive test charge is attracted towards it from as far away as infinity (or simply the edge of the paper). If there is a configuration of two source charges, then the electric field would either extend from the positive source charge towards the negative source charge.
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