Calculating Electricity Costs

This video tutorial introduces a JavaScript calculator designed to estimate the cost of running electrical devices over time. It explains how to input power consumption, duration, and electricity rates to calculate costs. The tutorial provides examples, such as calculating the cost of using a shower or a light bulb, and highlights the significance of understanding electricity rates in different regions. It also discusses the implications of power consumption for various appliances, encouraging viewers to explore the costs of everyday devices.

What are the three main parameters needed to calculate the cost of running an electric device using the JavaScript calculator?

• Room temperature, humidity, and altitude

• Voltage, current, and resistance

• Power in watts, time the appliance is on, and electricity rate

• Device brand, model, and color

In the UK, how is the electricity rate typically expressed?

• Euros per kilowatt hour

• Pence per kilowatt hour

• Dollars per kilowatt hour

• Yen per kilowatt hour

If an appliance uses 1000 watts for one hour, how much will it cost at a rate of 22.19 pence per kilowatt hour?

• 44.38 pence

• 22.19 pence

• 33.28 pence

• 11.09 pence

How much does it cost to run a 100 watt light bulb for 10 hours at a rate of 22.19 pence per kilowatt hour?

• 44.38 pence

• 2.22 pence

• 11.09 pence

• 22.19 pence

What is the cost of using a 9.5 kilowatt electric shower for 10 minutes at a rate of 22.19 pence per kilowatt hour?

• 35 pence

• 70 pence

• 17.5 pence

• 52.5 pence

How much does it cost to run a 100 watt light bulb for one day at a rate of 22.19 pence per kilowatt hour?

• 22.19 pence

• 53 pence

• 106 pence

• 11.09 pence

What is the estimated cost of running a 10 watt router for a year?

• 15 pounds

• 20 pounds

• 10 pounds

• 5 pounds

Running a device at 10 watts for one year is equivalent to drawing how many kilowatts in one hour?

• 100 kilowatts

• 50 kilowatts

• 87 kilowatts

• 120 kilowatts

What is the purpose of the JavaScript calculator discussed in the video?

• To convert currencies

• To measure the speed of internet connections

• To calculate the cost of running electric devices

• To predict weather patterns

What should you do if you have questions or comments about the calculator?

• Leave them in the comments below the video

• Email the developer

• Post on social media

• Call customer support