An electron beam with cross-section area 1.0 mm 2 has 6 × 10 16 electrons (q = 1.6 × 10 -19 C) passing per second perpen
9.6 × 10 3 is correct per An electron beam with cross-section area principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
