Passage IV

Figure 1 is a diagram of an RLC circuit. The circuit has a power supply and 3 components: a resistor (R), an inductor (L), and a capacitor (C).

Electric current can flow through the circuit either clockwise (positive current) or counterclockwise (negative current). Figure 2 shows how the electric current in the circuit, I (in amperes, A), and the power supply voltage, Vs (in volts, V), both changed during a 20-millisecond (msec) time interval.

Figure 3 shows how the voltages across the components—VR, VL, and VC, respectively—each changed during the same 20 msec time interval.

25. Based on Figure 2, at which of the following times was the current in the circuit flowing counterclockwise?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Look at the first and second lines of the second paragraph of the article, when the current I is negative, the current direction is counterclockwise;

Look at figure 2, the waveform corresponding to I, when the time is 10-20 msec , the current is negative (the current is 0 at 10 msec and 20 msec);

So D option 15 msec complies