Unit 7: Electric Circuit

An electrical appliance is made up of four components. These are the:

• energy source, wires, output device and mirror

• energy source, string, output device and switch

• energy source, wires, output device and switch

• force, wires, output device and switch

Why are electrical wires covered in rubber?

• To make it look pretty

• To help electricity flow along the wire

• To make it safe

• To add more energy

What needs to be done to this circuit so that the lamp lights up?

• Close the switch

• Add a source and close the switch

• Add another lamp

• Add another lamp and a switch

Tags

NGSS.MS-ETS1-1

Why is a battery important in an electrical circuit?

• As a source of energy.

• As a path for electricity to flow through.

• As a connector to connect all parts of a circuit.

Why must parts of a circuit be properly connected before the bulb can light up?

• To ensure that the bulb can light up.

• To ensure that the battery can produce light in a closed circuit.

• To ensure that electric current can flow through the closed circuit.

Look at the diagram. Why did the bulb not light up?

• The bulb was fused.

• The battery had not enough electric current to light up the bulb.

• The switch was opened and prevented electric current from flowing through the circuit.

Look at the circuits in the diagram. In which circuit will the bulb be brighter?

• Circuit C

• Circuit D

• Both circuits, the bulbs will have the same brightness.

State one advantage of bulbs arranged in parallel arrangement in a circuit.

• When one bulb fused the other can still light up.

• Reduce the amount of electric current used for both bulbs.

• Both bulbs in a parallel arrangement in circuit will share the electric current produced by the battery.

Circuits often include a _____________ to control the flow of current.

• switch
• conductor
• voltage
• current

Tags

NGSS.MS-ETS1-1

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

• Because copper insulate electricity

Tags

NGSS.4-PS3-2

NGSS.5-PS1-3