Unit 5 Electricity and Magnetism Review

Which material would best conduct electricity?

• Copper Wire

• Semiconductor

• Glass Jar

• Plastic Fork

Static electricity occurs when electrons transfer from one object to another. This is usually caused by:

• Water

• Friction

• Voltage

• Current

A student rubbed a balloon against a wool sweater. Afterwards, the balloon stuck to the sweater. What happened to cause this?

• The balloon gave the sweater a neutral charge.

• The balloon protons from the sweater

• The balloon removed electrons from the sweater.

• The balloon gave the sweater a negative charge.

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What kind of circuit is this?

• Series
• Consecutive
• Parallel
• Training

Which type of circuit has more than one loop, and when one light goes out, the others stay on.

• open circuit

• series circuit

• parallel circuit

Why are the lights so dim in B?

• It is a series circuit, all lightbulbs are sharing electricity.

• It is a parallel circuit, all lightbulbs have their own path for electricity.

• There is a gap/break in the circuit.

• The battery has less voltage.

The crane in the picture is able to pick up the car without using a "claw." However, when the electricity is cut, the car will drop. What is used to pick up the car?

• Resistor

• Generator

• Diode

• Electromagnet

Tags

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A device that converts electrical energy to mechanical energy in order to do work.

• Motor

• Generator

• Resistor

• Transistor

A device that converts mechanical energy to electrical energy.

• Motor

• Generator

• Resistor

• Transistor

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Which electromagnet is stronger?

• #1 because the wire is coiled around the bar fewer times.

• #2 because the wire is coiled around the bar more times.

• #1 because it uses a smaller battery.

• #2 because it uses a bigger battery.

Tags

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