Current and Resistance

One ampere of current is the movement of _____ through a given area in one second A. One coulomb of charge B. One volt of potential difference C. One joule of energy D. One electron

A

The current of a non-ohmic material is plotted against the applied potential. How would you describe the resulting graph? A. The graph will have a constant positive slope B. The graph will have a variable positive slope C. The graph will have a variable negative slope D. The graph will have a constant negative slope

B

Electric current in a wire is the A. Number of electric charges moving from one location to another in the wire B. Net movement of electrical energy through the wire C. Rate at which electric charges move through an area of the wire D. Rate at which electrical energy is used to move charges through the wire

C

The speed at which an electron moves in an electric field in a conductor is the A. Speed of light B. Average collision speed C. Drift velocity D. Average electron speed

C

What is the potential difference across a 10 Ω resistor if the current in the resistor is 3.0 A? A. 0.3 V B. 3 V C. 30 V D. 15 A

C

When a current moves through a copper conductor, electrons collide with copper atoms. The result of these collisions is A. An increase in voltage B. A decrease in resistance C. An increase in temperature D. A decrease in voltage

C

Which factor is least likely to affect the resistance of a conductor? A. The length of the conductor B. The temperature of the conductor C. The overall shape of the conductor D. The material the conductor is made from

C