## anonymous 2 years ago help? 2 questions medal c:!

1. anonymous

1.A 2000 W toaster operates on a household circuit of 200 V. What is the resistance of the wire the make up the heating element of the toaster?

2. ksaimouli

Resistance = Voltage / Current

3. anonymous

0.1?

4. ksaimouli

Si unit of current is amp but they gave us power

5. anonymous

electric power (watts)=votlage*amperage, amperage=voltage/resistance so 2000W=200V*Amperage (10amp). 10amp=200V/resistance (20)

6. anonymous

20 ohms

7. ksaimouli

$power=\frac{ V }{ I }$

8. ksaimouli

solve for V

9. ksaimouli

from above equation

10. anonymous

ty :) @ksaimouli and @SalvadorV kk hold on

11. anonymous

you have the intensity formula wrong

12. anonymous

me?

13. anonymous

sorry the power formula

14. anonymous

P=V*I

15. anonymous

oh so I got it wrong?

16. anonymous

yes, Watts=Volts*Amps Amps=Volts/Ohms

17. anonymous

oh wait im confused .-. sorry

18. anonymous

watts=volts^2/ohms 2000=200^2/ohms ohms=200^2/2000 = 40 000/2000=20 ohms

19. anonymous

don't worry, we all make mistakes

20. anonymous

I feel stupid :l but what is ohms?

21. ksaimouli

resistance (unit)

22. anonymous

ohms is the measure for resistance

23. anonymous

oohh ok! ty for helping me c: do you mind helping with 1 more?

24. anonymous

and ksaimouli has his formula wrong .-.

25. anonymous

sure

26. anonymous

that's why I got confused :c and kk

27. anonymous

2.An electronic device is rated at 0.35 W when connected to 150 V. What is the resistance of this device?

28. anonymous

see, its the same kind of question so $0.35W=150V*amps$

29. anonymous

so $amps=\frac{ 0.35W }{ 150V }$

30. anonymous

I was just about to put that lol

31. anonymous

ty again :)

32. anonymous

and we know that $Amps=\frac{ volts }{ ohms }, 0.00233333333=\frac{ 150V }{ Ohms }$

33. anonymous

remember ohms are the unit for resistance, normally noted with the sign$\Omega$

34. anonymous

here we have to substitute for ohms, so we pass them to the left side multiplying, and then we pass the 0.00233333333 dividing the voltage

35. anonymous

so we get $\Omega=\frac{ 150V }{ 0.00233333333Amp }$

36. anonymous

got it ! :) so =64285.72

37. anonymous

yea.

38. anonymous

sorry they left u so soon.

39. anonymous

um ok

40. anonymous

wow. nice pic.

41. anonymous

perfect! :D

42. anonymous

wow dude. ur late.

43. anonymous

.-. ok, whatever you say

44. anonymous

I'm actually trying to help people here instead of flirting you know?

45. anonymous

i'm helping finish the work u left unfinished. plus i could get her before u do anyway.

46. anonymous

I don't care about that, I have a girlfriend, plus just hopping in and saying "yes" is not exactly helping much

47. anonymous

i know. but i also know not 2 leave a girl hanging.