Physics, Electricity, Magnetism, Science, Math.
q₁ , the number of electric lines that will cross the surface is φ1 =q1/ε₀ . And for the charge q2 , it is φ2 =q2/ε₀ . If we put both the charges inside the closed surface , then all of the electric field lines generated from both the charge q1 and q2 will cross the surface . Because no electric