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Q.
Two point charges $+ Q$ and $+ q$ are separated by a certain distance. If $+Q >+q$ then in between the charges the electric field is zero at a point
Electric Charges and Fields
Solution:
Electric field is directly proportional to the magnitude of charge and inversely proportional to the square of the distance from the charge. Therefore charge $+Q$ produce a comparatively stronger electric field than $+q$ which get at cancelled with each other at a point closer to $+q$.