Final answer:
To calculate the total charge that passes through a device with a rated current of 650 mA in 45 minutes, you can use the formula Q = I × t, where Q is the total charge in coulombs, I is the current in amperes, and t is the time in seconds. The result is 1755 coulombs.
Step-by-step explanation:
To find the total charge (Q) that passes through an electric device in 45 minutes, we can use the relationship between current, charge, and time. The current (I) is the rate at which charge flows, and it is given by I = Q/t, where Q is the charge in coulombs (C) and t is the time in seconds. In this question, the rated current is 650 mA, which is 0.650 A, and the time is 45 minutes, which we need to convert to seconds: 45 minutes × 60 seconds/minute = 2700 seconds.
Using the formula Q = I × t, we can calculate the total charge:
Q = 0.650 A × 2700 s
Q = 1755 C
Therefore, the total charge (Q) that passes through the device in 45 minutes is 1755 coulombs.