Question

A smart phone charger delivers charge to the phone, in the form of electrons, at a rate of -0.75 C/s. Part A How many electrons are delivered to the phone during 34 min of charging? N = electrons SubmitMy AnswersGive Up

Answer 1

Concepts and reason

The concepts required to solve this problem are the current, charge, and number of electrons.

Initially, write the expression of the current in terms of the charge and the time. Rearrange the expression of the current for the charge. Later, using the values of the current and the time, calculate the charge delivered to the phone.

Finally, calculate the number of electrons delivered to the phone using the expression of the total charge in terms of the number of electrons and the charge of the electron.

Fundamentals

The expression of the current is,

Here, I is the current, q is the charge, and t is the time.

The expression of the total charge in electrostatics is,

$q=ne $

Here, q is the charge, n is the number of electrons, and e is the electron.

The expression of the current is,

Rearrange the expression for q.

Substitute for I and 34 min for t.

The expression of the total charge in electrostatics is,

$q=ne $

Rearrange the expression for the n.

Substitute for q and for e.

Ans:

The number of electrons delivered to the phone is .