Electricity Assessment

Check all the examples that produce static electricity.

• lightning

• a dry cell battery

• a power plant

• rubbing a latex balloon and wool together

• a rechargeable battery

In a circuit diagram, the symbol shown by a long line next to a short line represents

• a battery

• a filament

• a bulb

• a wire

Why is an electrical wire covered by plastic?

• The plastic is a good conductor of electricity.

• The copper wire inside the plastic is a good insulator of electricity.

• The plastic will not melt if it gets too hot.

• The plastic is a good insulator and keeps the wire from shocking you.

In which of the diagrams below will the bulb NOT light?

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In which of these diagrams will the light be the brightest?

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What is an insulator?

• A circuit in which electric current can flow in an unbroken path

• A circuit in which electric current cannot flow

• Matter that allows electric current to easily pass through it

• Matter that does not allow electric current to easily pass through it

What is an open circuit?

• A circuit in which electric current can flow in an unbroken path

• A circuit in which electric current cannot flow

• Matter that allows electric current to easily pass through it

• Matter that does not allow electric current to easily pass through it

What is a closed circuit?

• A circuit in which electric current can flow in an unbroken path

• A circuit in which electric current cannot flow

• Matter that allows electric current to easily pass through it

• Matter that does not allow electric current to easily pass through it

What is a conductor?

• A circuit in which electric current can flow in an unbroken path

• A circuit in which electric current cannot flow

• Matter that allows electric current to easily pass through it

• Matter that does not allow electric current to easily pass through it

• The end with the bump is the positive terminal of the dry cell battery.

• The end with the bump is the negative terminal of the dry cell battery.

• The end with the bump is the positive terminal of the wet cell battery.

• The end with the bump is the negative terminal of the wet cell battery.