Question

what amount of energy does a kettle use to boil water if it has 800C of charge passing through it with a potential difference of 120V?

Answer 1

E=QV I believe.

http://muller.lbl.gov/teaching/physics10/old%20physics%2010/physics%2010%20notes/voltsampsetc.html

Answer 2

would the formula change to charge=difference in potential difference / potential difference
so 800/120 which is 6.6=7 amps?

Answer 3

I don't understand. I thought you are looking for the energy

Answer 4

oh sorry i thought i had to switch the formula for potential difference around

Answer 5

so 800 divided by 120?

Answer 6

following E= Q/V

Answer 7

Oh no they are multiplied together. E=QV=Q*V

Answer 8

SORRY

Answer 9

so it would be 800x120

Answer 10

which would be 96000

Answer 11

Yes

Answer 12

joules?

Answer 13

or C

Answer 14

oops A

Answer 15

Yes Joules since it is C times J/C. (V=J/C)

Answer 16

oh okay thank you

Answer 17

You're welcome :)