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Two point charges Q and – Q/4 are separated by a distance x. Then

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potential is zero at a point on the axis which is x/3 on the right side of the charge – Q/4

potential is zero at a point on the axis which is x/5 on the left side of the charge – Q/4

electric field is zero at a point on the axis which is at a distance x on the right side of the charge – Q/4

there exist two points on the axis where electric field is zero

answer is A, B, C.

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Detailed Solution

Potential is zero at a point on the axis which is x / 3 on the right side of the charge −Q/4

Potential is zero at a point on the axis which is x/5 on the left side of charge -Q/4.

As the charges are unlike in nature, the point of zero electric field will be one point out side the line joining the two point charges.

It will be at a distance of x from the charge -Q/4.

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