AP and TS EAMCET Medical Model Paper 10

(3) Electric intensity at the location of A is due to charge -3Q.
∴EA=

1

4π∊o

3Q

r2

along AB
Electric intensity at the location of B is due to charge Q.
∴EB=

1

4π∊o

Q

r2

along AB
∴EB=

EA

3

and both are in same direction.