I think i have the answer but im not sure

[floby99]

My question reads:

A heating unit draws a current of 10 amperes on a 120 volt circuit. I was on for 40 hours in one week and a bill of $1.68 was rendered for electrcity it consumed. At what rate was the electicity billed?

The answers they gave:

a) 5 censt b) 4.5 cents c) 3.5 cents d) 6 cents

a) 5 ohms b) 10 ohms c) 15 ohmes d) 20 ohms


i got the first answer which is b 4.5 cents but the second one im not sure on. When i do the math i get 12 ohms. What did i do wrong?

 

[gardiner]

Re: I think i have the answer but im not sure

What was the second question? If it was how much resistance were you dealing with E/I=R 120/10=12
The first one though I must of done something wrong on I got 3.5 cents myself

 

[charlie b]

Re: I think i have the answer but im not sure

The answers are 3.5 cents per killowatt-hour, and 12 ohms. Who are the "they" that gave you different answers? Instructors? Publishers of a course workbook?

 

[mikeames]

Re: I think i have the answer but im not sure

Mistake in the test ???

1.2 kw x 40 hours= 48 kwh

48kwh/1.68=.035


120/10= 12 ohms

 

[hurk27]

Re: I think i have the answer but im not sure

Now I understand why we get the electricans that we get these's day's.