Power Bill Calculations

How much will it cost to run a 60 W lamp for 10 hours?

• $0.05

• $0.18

• $3.00

• $18.00

An electric rice cooker rated 800W, 230V is switched on for 30 minutes. Calculate the cost of energy that is used by the rice cooker if the cost per kWh is 30sen.

• RM12

• RM0.12

• RM1.20

• RM120

The kilowatt-hour is the unit of

• electrical charge

• electrical energy

• electrical power

• voltage

An electric rice cooker rated 800W, 230V is switched on for 30 minutes. How much electrical energy is used?

• 400kWh

• 3.48kWh

• 0.4kWh

• 104kWh

Tags

NGSS.HS-PS3-1

What is calculated by the power of the appliance x by how much time it was used?

• The total amount of energy

• The total amount of power

• The total watts

Tags

NGSS.HS-PS3-1

If a light bulb consumes 100 W and is used for 10 hours, how many kilowatt-hours of energy does it consume?

• 10 kWh

• 1 kWh

• 0.1 kWh

• 1000 kWh

If an oven uses 2000 W (2 kW) and is operated for 3 hours, how many kilowatt-hours are used?

• 6 kWh

• 600 kWh

• 60 kWh

• 0.6 kWh

How many kilowatt-hours are consumed if a 750-W air conditioner runs for 8 hours?

• 0.75 kWh

• 7.5 kWh

• 6 kWh

• 60 kWh

A TV that consumes 250 W is used for 5 hours. How many kilowatt-hours of energy is used?

• 1.25 kWh

• 12.5 kWh

• 125 kWh

• 0.125 kWh

A 1500W heater is used for 2 hours. Calculate the energy consumed in kilowatt-hours.

• 3 kWh

• 0.3 kWh

• 30 kWh

• 1.5 kWh