What is the power used by the toaster?
help I am lost :(
2007-05-21 08:42:32 · 5 answers · asked by Eric 1 in Science & Mathematics ➔ Physics
By combining Ohm's Law (V=IR) and Circuit Power (P=IV), we get P=V^2/R. This is done here:
V=IR (Ohm's Law)
V/R=I (Divide both sides by R)
P=V^2/R (Sub V/R into I in the power equation)
Solving it, plug in the variables:
P=V^2/R
P=(120^2)/(15)
P=960 Watts
Thus, the toaster used up total of 960 watts.
2007-05-21 09:04:04 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Amps = Volts/Resistance = 120/15 = 8 amps
Watts = Volts x Amps = 120 x 8 = 960 Watts.
2007-05-21 08:57:16 · answer #2 · answered by Norrie 7 · 0⤊ 0⤋
The equation you need to use is:
P=V^2/R
where P is power in watts,
V is volts across the toaster,
and R is the wiring resistance of the toaster.
Plugging in numbers, P=120^2/15 = 960 watts
2007-05-21 08:51:17 · answer #3 · answered by Gary 2 · 0⤊ 0⤋
Power equals Voltage squared divided by resistance.
120 x 120 =14400 (voltage squared)
14400 divided by 15 will give you the power.
2007-05-21 08:47:02 · answer #4 · answered by Joseph F 5 · 0⤊ 0⤋
120v/15ohms= 8 amps
power is watts. = volts x amps
120 x 8 = 960w
2007-05-21 08:46:54 · answer #5 · answered by Anonymous · 0⤊ 0⤋