Electricity and Magnetism

Exploring Electromagnetic Spectrum

• Radio waves have longest wavelength

• Radio waves have highest frequency

• Visible light has longer wavelength than microwave radiation.

• Visible light has shorter wavelength than infrared radiation.

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Define wavelength

• Distance between identical points (adjacent crests) in the adjacent cycles of a wave

• Distance between two consecutive points on a wave

• Distance between highest point and lowest point on a wave

• Distance between 0 and highest point on a wave

What is the relationship between frequency and wavelength?

• Direct

• Unrelated

• Inverse

• Parallel

Speed of light in glass

• Is the same as in vacuum

• Is smaller than in vacuum

• Is greater than in vacuum

• Is 0

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Current in a wire

• Is movement of electrons

• Creates magnetic field

• Creates chemical reaction

• is due to gravity

A changing magnetic field

• Induces ions in the loop to move

• Induces atoms in the loop to move

• Induces current in the loop, electrons move

• Induces resistance in the loop, electrons have a hard time moving

What components are used in a motor to generate motion?

• magnet, coil, power source

• piston, cylinder, fuel

• fan, blades, electricity

• battery, wires, controller

How does a motor utilize magnets and a loop of wire?

• By using the magnets to generate electricity in the wire.

• By using the magnets to create a static magnetic field.

• By generating electricity in the wire.

• Electromagnet created by the wire loop is attracted or repelled by the magnets.

What is the role of the wire loop in a motor?

• It acts as a resistor to control the flow of electricity.

• It creates an electromagnet that interacts with the magnets.

• It acts as a conduit for the electricity to flow through the motor.

• It has no specific role.

How does a generator produce electricity?

• magnet, coil, source of power

• magnets, coil, moving rotor

• fan, blades, electricity

• battery, wires, controller