Question

Three point charges are placed at the three corners of an equilateral triangle as shown in figure. The statement

which is true for net electric potential V and the net electric field intensity E at the centre of the triangle is

O

q

q –2q
​

Answer 1

see ELECTRIC POTENTIAL IS A SCALAR QUANTITY so it can't be zero because of vector addition but it can be zero if there are equal +ve and equal -ve charges (here it is unequal)

And ELECTRIC FIELD INTENSITY IS A VECTOR QUANTITY so it can be zero because of vector addition

VECTOR ADDITION MEANS IF IN A POLYGON THERE ARE CHARGES OF SAME MAGNITUDE AT CORNERS THE VECTOR SUM OF IT WOULD BE ZERO