Question

two point electric chargea of unknown magnitude nd sign are placed a distance apartb.The electric field intensity is 0 at a point not between the charges but on the line joining them.write 2 essential conditions for this to happen

Answer 1

This will happen only if the nature of charges are opposite and both the charges are different in their magnitudes...

If charges are like , then Electeic will never be cancel out as E direct in the same direction...it actually gets added up...E ( Electeic field) will be zero only if charges have opposite nature due to opposite nature , Direction of E will be opposite to each other...

and Charges will not be of equal magnitude...If charges are equal in magnitude then E will be non zero...see snap