Two point charges of unknown magnitude and sign are placed adistance r apart. It

Question

Two point charges of unknown magnitude and sign are placed adistance r apart. It is found that the electric fieldintensity is zero at some point on the line joining the two chargesfrom shich it can be concluded that the two charges must have/be........
( answer should be in terms of magnitude and sign ofcharges) Two point charges of unknown magnitude and sign are placed adistance r apart. It is found that the electric fieldintensity is zero at some point on the line joining the two chargesfrom shich it can be concluded that the two charges must have/be........
( answer should be in terms of magnitude and sign ofcharges)

Explanation / Answer

Electric filed on the line joining thetwo point charges is zeroonly when the two charges are of same sign.

Therefore when two point charges of unknown magnitude and signare placed a distance r apart, and if it is found that the electricfield intensity is zero at some point on the line joining the twocharges from which it can be concluded that the two chargesmust have same sign.

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