Electric Circuits

Front

Why are electrical wires usually covered with a layer of plastic?

Back

To make it safe

Front

What needs to be done to this circuit so that the lamp lights up? Options: Close the switch, Add a source and close the switch, Add another lamp, Add another lamp and a switch

Back

Add a source and close the switch

Front

Why is electrical wiring usually made from copper?

Back

Because copper conducts electricity

Front

Which switch or switches must be closed to make the lamps light? Options: Only switch 1, Only switch 1, Switches 1 and 2, Switches 1, 2 and 3

Back

Switches 1, 2 and 3

Front

Why does the bulb light for an instant and then go out in a simple circuit with one bulb and three batteries?

Back

Too much electricity flows through the bulb's filament

Front

Which statement about electric current is correct?

Back

It always flows from the point where the electrical potential is highest to the point where it is lowest

Front

How can Peter make the bulbs dimmer in a simple circuit with two bulbs and two batteries?

Back

Replace one of the batteries with a section of wire.

Front

If lamp 1 is unscrewed from its holder, what will happen to lamp 2?

Back

It will go out

Front

Why is a bulb brighter when it is powered by two batteries rather than one?

Back

Because the flow of electricity in the circuit is greater

Front

If lamp 2 is unscrewed from its holder, what will happen to lamp1?

Back

It will stay lit