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Plz help me on this... Electricity question...?
Plz do not answer if you don't know... Thanks
If a 12 volt circuit is drawing 3 amperes, then the circuit resistance is:
A) .25 ohms
B) 4 ohms
C) 36 ohms
7 Answers
- hodgetts21Lv 51 decade agoFavorite AnswerSource(s): just remember to use ohms law, and use my cheat link if you like and you never have to do the math yourself...
- 1 decade ago
The power formula for the relationship between voltage and resistance is E=IR or E=I x R where E is the electromotive force in volts, I is current in amperes, and R is curcuit resistance in ohms. Substituting the given values into the formula: 12=3R. solving for R then becomes E/I=R or 12/3=R
R=4 Answer is 4 ohms or B.
Source(s): Electronics 101 basic course study. - Anonymous1 decade ago
Ohms = volts/amps
Ohms = 12 volts divided by 3 amps
12 divided by 3 = 4 ohms
a real good link for you below....one that i use a lot
Source(s): http://www.the12volt.com/ohm/ohmslaw.asp er doc - Dr WLv 71 decade ago
V = I x R
V = 12 volts
I = 3 amps
R = V / I = 12 volts / 3 amps = 4 ohms
answer is B
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- John BLv 41 decade ago
4 ohms.
volts = current times resistance.
resistance = voltage divided by current.
current = voltage divided by resistance.
its called ohms law.
- Anonymous1 decade ago
no resistance cause if there were resistance then you would have no flow
