Energy Review

Multiple Choice

Explain how the Law of Conservation of Energy applies to a roller coaster ride.

• The energy is lost as the roller coaster moves

• The potential energy at the top is converted to kinetic energy as it descends

• The energy is created as the roller coaster speeds up

• The energy is destroyed when the roller coaster stops

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Multiple Choice

How will the electroscope's tape move if each piece has a negative charge?

• The pieces of tape will repel each other because they make contact with each other.

• The pieces of tape will attract each other because they make contact with each other.

• The pieces of tape will repel each other because of the electric field around each piece.

• The pieces of tape will attract each other because of the electric field around each piece.

Multiple Select

Which of the following is true about electricity & magnetism?

• energy cannot be transferred by an electric current

• a magnetic force can attract a metal object only if the object is touching the magnet

• a magnetic force can be produced by an electric current

• an electric current can be produced by a changing magnetic force

Multiple Choice

The flow of electric charges through a material describes an electric ____.

• inductance

• voltage

• resistance

• current

Multiple Choice

Which of the following images best shows how the iron filings arranged themselves?

• Top Left

• Top Right

• Bottom Left

• Bottom Right

Multiple Select

Which of the following will exert a force on a magnet?

• another magnet

• a nearby piece of glass

• a nearby piece of plastic

• a nearby electric current

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Multiple Choice

The force on a compass dial is an example of a force that _____.

• acts at a distance

• acts only on contact

• needs electricity to act

• acts through particles in the air

Multiple Choice

Where is Earth's magnetic field strongest?

• Along the outside lines
• Along the inside lines on either side
• Where the lines are close together at the poles
• In the space outside of the lines

Multiple Choice

As the electrons flow through the wire, ______ is generated around the wire.

• a magnetic field

• elastic potential energy

• gravitational potential energy

• a convection current

Open Ended

What needs to happen to make the light bulb shown in this circuit turn on?

Multiple Choice

In a circuit, electrons travel in ___

• different directions.

• a circular path.

• alternating directions.

• the same direction.

Multiple Choice

Where is the power source in the above circuit?

• point Z

• point Y

• point W

• point X

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Multiple Choice

In which of the following circuits will electric current flow?

• A

• B

• C

• D

Multiple Choice

This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -

• the switch gives energy to the battery
• the buzzer is made of special plastic
• the wires are cooled by the surrounding air
• electricity can flow in a complete path

Multiple Select

Which of the following might allow Charlotte's electromagnet to pick up a single paper clip at a time?

• increasing the number of batteries supplying voltage to the electromagnet

• increasing the number of loops in the electromagnet's coil

• increasing the distance between the electromagnet and the paper clips

• removing the iron nail from the core of the electromagnet

Multiple Choice

Which of these would make an electromagnet stronger?

• add more loops of wire between the magnets

• rotate the coil in a counterclockwise direction

• change the polarity of the magnet

• decrease the size of the magnets

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident