Final answer:
The current in the circuit is 45 amperes (A), calculated using the formula I = Q/t, where the charge Q is 45 C and the time t is 1 second.
Step-by-step explanation:
The question involves calculating the current in a circuit when a charge of 45 coulombs (C) moves past a point in 1 second. Current (I) is the rate at which charge flows through a point in a circuit and can be calculated using the formula I = Q/t, where Q is the charge in coulombs and t is the time in seconds the charge takes to pass through. Therefore, the current is I = 45 C / 1 s, which equals 45 amperes (A).