Question

The following statement best describes the relationship between first cost and life cost when evaluating an electrical system:

Answer 1

The relationship between first cost and life cost when evaluating an electrical system is based on the energy consumed. The more electric appliances you use and the longer they are left on, the higher your electric bill will be.

Step-by-step explanation:

The correct answer is option: The relationship between first cost and life cost when evaluating an electrical system is that the cost is based on the energy consumed. You can calculate the energy consumed using the formula E = Pt, where E is the energy, P is the power, and t is the time. The more electric appliances you use and the longer they are left on, the higher your electric bill will be because you are paying for the energy used.

For example, if you have a 100W light bulb turned on for 5 hours, the energy consumed would be:

1. E = Pt
2. E = 100W x 5h = 500Wh = 0.5kWh

Therefore, the cost will depend on the energy consumed, which is determined by the power of the appliances and the duration of their use.