1. Which of the following characteristics are true about a series circuit? I. The current that goes through each resistor is the same. II. The drop in the voltage across each resistor is proportional to the resistance of that resistor. III. The current in the circuit is equal to the sum of the currents flowing in each part of the circuit.

A. II only

B. I and III

C. I only

D. I and II

2.

4. According to Kirchoff's First Law, what can be said, specifically, about the currents that meet at point A, and about the currents that meet at point B? A B R 1 R 2 + R3 B i U Font Family - AA- A OF . E . E - 9 6/ BOBV = 12 V R 1 R2 R 3 19. In the circuit shown, if R, = 1.0 0. R2 = 20 0, and Ry = 300 0, what is the current, I, flowing back to the battery? 6.3A 12.0 A 12.6 A 5.2 A 20. These materials allow current to flow under certain circumstances, and act like insulators under other circumstances, which makes them useful as switches in modern electronics. Superconductors Semiconductors Insulators Conductors