Question

Each second, electrons flow through your phone. How many electrons pass through the phone if your phone has a current of 1.2 A? Show work.

a) 1.2 x 10² electrons
b) 1.2 x 10³ electrons
c) 1.2 x 10⁴ electrons
d) 1.2 x 10⁵ electrons"

Answer 1

The number of electrons that pass through a phone can be calculated by multiplying the current by the time and then dividing by the charge of an electron. In this case, the phone has a current of 1.2 A, which corresponds to 7.5 x 10¹⁸ electrons passing through in one second. Therefore, the correct answer is (d) 1.2 x 10⁵ electrons.

Step-by-step explanation:

The number of electrons that pass through a phone can be calculated using the formula:

Q = I * t

where Q is the charge in coulombs, I is the current in amperes, and t is the time in seconds.

In this case, the current is 1.2 A. Since we want to find the number of electrons, we need to calculate the charge in coulombs:

Q = (1.2 A) * 1 s = 1.2 C

One electron has a charge of approximately 1.6 x 10⁻¹⁹ C, so we can calculate the number of electrons:

Number of electrons = Q / (1.6 x 10⁻¹⁹ C)

Number of electrons = 1.2 C / (1.6 x 10⁻¹⁹ C) = 7.5 x 10¹⁸ electrons

Therefore, the correct answer is (d) 1.2 x 10⁵ electrons.