Question

An electron is moving in a circular path of radius 5.1 × 10^–11m at a frequency of 6.8 × 10¹⁵ revolution/sec. The equivalent current is approximately

• A. 5.1 × 10^–3A
• B. 6.8 × 10^–3A
• C. 1.1 × 10^–3A
• D. 2.2 × 10^–3A

Answer 1

Answer: (C)

1.1 × 10^–3A

Answer 2

⇒

⇒ $i = \frac { Q } { T } = 1.6 \times 10 ^ { - 19 } \times 6.8 \times 10 ^ { 15 }$= 1.1 × 10^–3 A