Question

In an atom electrons revolve around the nucleus along a path of radius 0.72 A making 9.4 x 1014 revolutions per second. The equivalent current is. (Given e = 1.6 x 10-19 C)

• A. 1.4 A
• B. 1.2 A
• C. 1.8 A
• D. 1.5 A

Answer 1

Answer: (D)

1.5 A

Answer 2

To calculate the equivalent current of the revolving electrons, we can use the formula for current:
I = n * q * f,
In this case, we are given:
n = 9.4 x 1014 revolutions per second,
q = 1.6 x 10-19 C (charge of each electron) and
f = 1 (since each electron completes one revolution per revolution).
Plugging in these values, we can calculate the equivalent current:
I = (9.4 x 1014) * (1.6 x 10-19) * 1
I = 1.504 A
Rounded to one decimal place, the equivalent current is approximately 1.5 A. Therefore, the closest option provided is (D) 1.5 A.