Chapter-1|Electric Charges and Fields | NCERT 12th Physics:
Electric Field Due to System of Charges:
Let we consider n point charges q1, q2, q3,...... qn with position vector r1, r2, r3......rn exert forces F1, F2, F3,.....Fn on test charge q₀ placed at origin O.
If E is electric field at point P due to the system of charges, then by principle of superposition of electric fields.
