If an appliance rated at 2000 watts is used for 2.5 hours, how much energy does it consume?

To determine how much energy an appliance consumes, you can calculate it using the power rating of the appliance and the time it's used. The formula to find energy consumption in watt-hours is:

Energy (in watt-hours) = Power (in watts) × Time (in hours)

In this case, the appliance has a power rating of 2000 watts, and it is used for 2.5 hours. So the calculation becomes:

Energy = 2000 watts × 2.5 hours = 5000 watt-hours

Since energy consumption is commonly expressed in kilowatt-hours (kWh), it's helpful to note that:

5000 watt-hours = 5 kWh

This value accurately reflects the energy consumed by the appliance during the time it was in use, corresponding to the second choice given in the options.

The answer reflecting 6000 watt-hours may arise from an incorrect manipulation of the terms or understanding of the period of use, which could lead to confusion. However, the calculation following the proper formula clearly demonstrates that the correct answer is 5000 watt-hours.