Unit-9 Electricity

What is electricity?

• A flow of protons around a circuit

• A flow of electrons around a circuit

• A flow of light through wires

• A flow of energy without any particles

Electricity is caused by the flow of ___ through a conductor.

In a simple circuit, electrons flow from the negative terminal of the battery to the positive terminal.

Which of the following is an example of an electrical conductor?

• Rubber

• Plastic

• Copper

• Wood

___ are materials that allow electrons to flow easily, such as metals like copper and aluminum.

Wood is a good electrical conductor.

How do we measure the current in a circuit?

• With a voltmeter

• With an ammeter

• With a thermometer

• With a resistor

The current in a series circuit is measured using an ___, which is placed in series with the circuit.

In a series circuit, the current is the same at all points.

What happens to the current in a series circuit when you add more lamps?

• The current stays the same.

• The current increases.

• The current decreases.

• The current disappears.