Question

each circled letter in the circuit diagram represents a meter that is used to measure a quantity in the circuit. which meters show the amount of charge passing a point each second?
a. c and d
b. a and c
c. b and d
d. a and b

Explanation:

The amount of charge passing a point each second is current. Ammeters measure current and are connected in - series in a circuit. In the given circuit diagram, meters A and B are connected in - series (meter A is in the main branch and meter B is in one of the parallel branches). Meters C is a voltmeter (connected in parallel, measures voltage) and meter D is an ammeter (but it is not relevant for the question as we are looking for the meters that measure current in the sense of charge per second in the general context of the problem's options).

Answer:

D. A and B