Question

A television using 500 watts per hour will equal 2 kilowatt-hours in how many hours?

a) 6 hours
b) 8 hours
c) 2 hours
d) 4 hours

Answer 1

To calculate how many hours a television using 500 watts will take to equal 2 kilowatt-hours, divide the total energy consumption (2 kWh) by the power usage (0.5 kW), which gives you 4 hours.

Step-by-step explanation:

A television using 500 watts per hour will equal 2 kilowatt-hours in how many hours? To find out, you need to convert the power usage into kilowatts (since power is typically measured in watts and energy consumption in kilowatt-hours).

A watt is equal to one joule per second, and a kilowatt is 1,000 watts. Therefore, 500 watts is equal to 0.5 kilowatts. To find out how many hours it takes for a 0.5 kW television to use 2 kWh of energy, you can divide the total energy (2 kWh) by the power usage in kilowatts (0.5 kW).

Mathematically:

2 kWh / 0.5 kW = 4 hours

So, the correct answer is (d) 4 hours.