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How to Visualize Electric Fields

signs of q 1 ...

Question

Consider the situation shown in figure. What are the signs of $q_{1} a n d q_{2}$ ?

A

Both positive

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B

both negative

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C

q₁ is positive and q₂ is negative

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D

q₁ is negative and q₂ is positive

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Solution

The correct option is D
q₁ is negative and q₂ is positive

The way we have defined electric field lines is that they originate from positive charge or infinity and terminate on negative charge or infinity. So if we have a closer look of the diagram we can see they originate from $q_{2}$ and terminate at $q_{1}$ . This means $q_{2}$ is positive and $q_{1}$ is negative.

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