An electric device delivers a current of 5.0 A for 10 seconds. How many electrons flow through this device? A) 0.20 B) 20 C) 2.0 D) 3.1 × 10²⁰ E) 31 × 10²⁰

Question

Quizplus · Accepted Answer

To calculate the number of electrons that flow through the device, we need to use the formula:

number of electrons = current × time × Avogadro's number / charge of an electron

where Avogadro's number is 6.022 × 10^23 and the charge of an electron is 1.602 × 10^-19 C.

Plugging in the values, we get:

number of electrons = 5.0 A × 10 s × 6.022 × 10^23 / 1.602 × 10^-19 C
number of electrons = 3.1 × 10^20

Therefore, the answer is (D) 3.1 × 10^20.

An Electric Device Delivers a Current of 5