DC Circuit revision

Select the things that occur when current flows in a DC circuit?

• heat

• magnetism

• electron flow

• resistance

If we have two dissimilar metals present, what will enable the cause for corrosion to occur?

• rust

• an electrolyte

• resistance

• voltage

Which appliances convert electrical energy to heat energy? (more than one answer)

• hot water system

• heater

• hotplate

• steam driven generator

A normally open switch will?

• not allow current to flow until operated

• allow current to flow

• stop current flow if operated

• do nothing

A normally closed switch will?

• not allow current to flow until operated

• allow current to flow

• stop current flow if operated

• do nothing

In a DC circuit a fuse in a circuit provides?

• potential difference

• Load

• Control

• protection

In a DC circuit a switch in a circuit provides?

• potential difference

• Load

• Control

• protection

In a DC circuit a resistor or lamp in a circuit provides?

• potential difference

• Load

• Control

• protection

In a DC circuit a resistor in a circuit provides?

• potential difference

• Load

• Control

• protection

In a DC circuit if the voltage doubles , what happens to the power used by the circuit

• goes up by 4 times

• doubles

• stays the same

• drops off