Mathematics · Aptitude - Speed and Rates
An electron beam with cross-sectional area 1.0 mm2 has 6 × 1016 electrons (q = 1.6 × 10-19 C) passing per second perpendicular to any section. The current density (in A/m2) in the beam is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 19.6 × 103✓
- 29.6
- 39.6 × 10-3
- 49.6 × 102
Correct answer
9.6 × 103
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