7.1 Electric Current and Resistance Quiz

What is a typical device found in a circuit that is powered by the voltage source?

• A switch

• A resistor

• A light bulb

• A capacitor

What component in a circuit is used to turn devices on or off?

• A resistor

• A conductor

• A switch

• A capacitor

What is the flow of charges through a circuit known as?

• Voltage

• Resistance

• Current

• Power

What material is typically used for conducting wires due to its excellent conductivity and relative cheapness?

• Silver

• Gold

• Copper

• Aluminum

Tags

NGSS.HS-PS2-5

Which material is a better conductor than copper but more expensive?

• Aluminum

• Silver

• Gold

• Iron

What type of charges can flow through solids?

• Positive charges

• Neutrons

• Electrons

• Protons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What is electric current a measure of?

• The number of protons in a wire

• The number of electrons flowing through a wire each second

• The speed of electrons in a wire

• The voltage across a wire

In direct current (DC) systems, how does the charge flow?

• In one direction, like a river's flow

• In multiple directions, like a wave

• In a circular motion

• Randomly, without a set path

What is a problem associated with DC generators?

• They can't send electricity over very long distances without losing a lot of energy.

• They are too expensive to produce.

• They are too small to generate enough power.

• They require constant maintenance.

Who wanted to develop DC generators?

• Nikola Tesla

• Thomas Edison

• Albert Einstein

• George Westinghouse