What will the ammeter show if a charge equal to 18C has passed through it in 10 minutes?

Given:

t = 10 minutes – time interval;

Q = 18 Coulomb – the charge that passed through the ammeter for a period of time t.

It is required to determine I (Ampere) – the current strength, which the ammeter will show.

Let’s convert time units from minutes to seconds:

t = 10 minutes = 10 * 60 = 600 seconds.

Then, to determine the current strength, you must use the following formula:

Q = I * t, hence:

I = Q / t = 18/600 = 0.03 Ampere (30 mA).

Answer: the ammeter will show a current value of 0.03 Amperes (30 mA).