Final answer:
To determine the charge passing through a point in the circuit as the current increases, use the formula: Charge (Q) = Current (I) × Time (t).
Step-by-step explanation:
To determine the amount of charge that passes through a point in the circuit as the current increases from 0 to 75% of the maximum current, we need to know the maximum current value. Once we have that, we can calculate the charge using the formula:
Charge (Q) = Current (I) × Time (t)
For example, if the maximum current is 10 Amperes and the time taken to reach 75% of the maximum current is 2 seconds, the charge that passes through the point in the circuit would be:
Q = 0.75 × 10 A × 2 s = 15 Coulombs.