help please I am lost :(
2007-05-21 08:31:08 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
E = IR is Ohm's Law.
E is the voltage, I is the current, R is the resistance
If 120 is the voltage and 15 is the resistance, the current is:
120V/15ohm or 8 amperes.
Now, Power is Voltage times Current (it is also current squared times resistance).
So, either way, you get the same answer. P=EI is 120V x 8 Amps or 960 watts.
Or P=I2R is 8 x 8 x 15 or 64 x 15 or 960 Watts
Once you see that it is all a relationship it gets easy.
2007-05-21 08:46:27 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Amps = Volts/Resistance = 120/15 = 8 amps Watts = Volts x Amps = 120 x 8 = 960 Watts.
2016-04-01 00:52:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Voltage squared divided by the resistance
2007-05-21 08:41:32 · answer #3 · answered by Gene 7 · 0⤊ 0⤋
1800 watts.
2007-05-24 14:45:29 · answer #4 · answered by johnandeileen2000 7 · 0⤊ 1⤋