Posted by **Kristie** on Thursday, April 19, 2012 at 12:07pm.

In periods of peak demand, power companies lower their voltage. This saves them power (and saves you money!). To see the effect, consider a 1200- W coffeemaker that draws 10 A when connected to 120 V. Suppose the voltage is lowered by 13 % to 104 V.(Caution: The 1200- W label is valid only when 120 V is applied. When the voltage is lowered, it is the resistance of the toaster, not its power, that remains constant.)

1)By how much does the current decrease?

2)By how much does the power decrease?

## Answer This Question

## Related Questions

- physics - In periods of peak demand, power companies lower their voltage. This ...
- math - diego is saving money to buy a computer game. he saves $2 the first month...
- phsyics - A light bulb rated by the manufacturer as using and average power of ...
- physics - During a “brownout,” which occurs when the power companies cannot keep...
- math - In A Year, Seema Earns RS 1,50,000. Find The Ratio Of Money That Seema ...
- math - jeremy spends 1/4 of his pocket money each week on books.he saves 2/3 of ...
- help - If you know the power rating of an appliance and the voltage of the line...
- SAT prep math - Maria has two piggy banks. In one piggy bank she saves dimes ...
- physics - A generating station is producing 1.2 x 106 W of power that is to be ...
- physics - I'm supposed to design a PV system that could provide an average ...

More Related Questions