Electricity and Waves

In which of the following circuits will all of the remaining light bulbs go out if bulb 3 burns out?

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Which object does NOT conduct electricity?

• copper wire

• iron nail

• salt water

• wood

What happens if there is a break at any point in a series circuit?

• no current flows

• current flows through an alternative path

• resistance goes to infinity

• current reverses direction

When an object has excess electrons, the become _________ charged

• Positively

• Negatively

• Neutrally

Opposite charges _____________ each other.

• attract

• repel

• do nothing to

What is a conductor?

• Material in which electrons can flow freely through

• Material that electrons do not move easily through

• Material the electrons cannot move through at all

• An object made of plastic

What is an example of a conductor

• metal

• rubber

• plastic

• wood

What is an insulator

• Material in which electrons can flow freely

• Material in which protons can flow freely

• Material that electrons do not move through easily

• Material that protons do not move through easily

What is electric current measured in?

• amps

• volts

• ohms

• watts

What is the current in a 160V circuit if the resistance is 2 ohms?

• 160A

• 180A

• 80A

• 70A