Two point charges a and b,whose magnitudes ar | vedclass

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Question

(A) From the graph,it can be observed that the electric field $E$ is always in the positive direction between $a$ and $b$.If $a$ is positive and $b$ i

Vedclass · Accepted Answer

$a$ is positive,$b$ is negative

Vedclass · Answer

(A) From the graph,it can be observed that the electric field $E$ is always in the positive direction between $a$ and $b$.If $a$ is positive and $b$ is negative,the electric field due to $a$ is directed away from $a$ (towards $b$,i.e.,positive) and the electric field due to $b$ is directed towards $b$ (towards $b$,i.e.,positive). Thus,the net field is positive.If both are positive,the field due to $a$ is positive and the field due to $b$ is negative. The net field would become zero at some point between them and change direction.If both are negative,the field due to $a$ is negative (towards $a$) and the field due to $b$ is positive (towards $b$). The net field would be negative near $a$.If $a$ is negative and $b$ is positive,the field due to $a$ is negative and the field due to $b$ is negative. The net field would always be negative.Therefore,the correct conclusion is that $a$ is positive and $b$ is negative.

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