Electricity

The tendency for a material to oppose the flow of electrons, changing electrical energy into heat energy and light.

• Voltage

• Resistance

• Current

• Circuit

Which of the following law explains that the strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit?

• Watt’s Law

• Ohm’s Law

• Gauss’ Law

• Kirchhoff’s Voltage Law

Which of the following is the measure of the opposition to current flow in an electrical circuit?

• Current

• Power

• Resistance

• Voltage

It is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space.

• Conductor

• Electric current

• Magnetic charge

• Electrical circuit

Electricity used in most homes is generated in a __________.

• Cell

• Conductor

• Power plant

• Thermonuclear reactor

Which of the following is an example of a conductor?

• A plastic cap

• A metal screw

• A wooden handle

• A glass paperweight

Which of the following is an example of an insulator?

• Iron

• Silver

• Rubber

• Copper wire

Which of the following explains a circuit?

• A pathway that electricity flows in and has a load and wire.

• A pathway that electricity flows and has a load, wire, and a puppy.

• A pathway that protons flow and has a load, wire, and a power source.

• A pathway that electricity flows and has a resistor, wire, and a power source.

What charge does an electron have?

• Positive

• Negative

• Neutral charge

Which of the following materials allows charges to flow easily?

• Wood

• Glass

• Electrical insulator

• Electrical conductor