Household Circuits

What is the SI unit of electrical energy?

• Joule

• Watt

• Ampere

• Volt

What does the formula W = QV represent?

• Resistance

• Voltage

• Power consumed

• Work done

What is the power consumed when a current of 1 ampere flows through a circuit with a potential difference of 1 volt?

• 1 Ampere

• 1 Volt

• 1 Joule

• 1 Watt

What is the commercial unit of energy commonly used?

• Kilowatt

• Megawatt

• Watt hour

• Joule

What is the formula for calculating electrical power?

• P = IV

• P = IR

• P = V/R

• P = W/t

What is the larger unit of power equivalent to 1000 Watts?

• Kilowatt

• Joule

• Megawatt

• Horsepower

What is Joule's law of heating related to?

• Time

• Resistance

• Voltage

• Current

What is the purpose of a fuse in an electrical circuit?

• To increase current

• To limit current

• To measure voltage

• To store energy

What happens when the current exceeds the rating of a fuse?

• The appliance works faster

• The voltage increases

• The circuit remains intact

• The fuse melts

What is the main advantage of the ring system of wiring?

• Independent appliance operation

• Higher current capacity

• Lower cost

• Easier installation