Question

10,000 alpha particles per minute are passing through a straight tube of radius r. The resulting electric current is approximately-

• A. 0.5 × 10^–16 amp
• B. 2 × 10¹² amp
• C. 0.5 × 10¹² amp
• D. 2 × 10^–12 amp

Answer 1

Answer: (A)

0.5 × 10^–16 amp

Answer 2

i = $\frac{n(2e)}{t}$ = $\frac{10000 \times 2 \times 1.6 \times 10^{–19}}{60}$= 0.5 × 10^–16 A