0
It means that the resistor will safely dissipate the heat involved in transporting that much power through, without burning up/out. If you exceed that rating, the resistor will become too hot for its own good.
Power is always linked with Voltage and Current, and Current is linked with Voltage and Resistance of the resistor. You will do well to remember the tandem of laws:
Power [Watts] = Potential [Volts] * Current [Amperes]
and
Current [Amperes] = Potential [Volts] / Resistance [Ohms]
For example, if you have a 100ohm resistor rated at 0.25W, then to satisfy that requirement, a voltage of no more than 5V can be applied to it, because 5V / 100ohm = 0.05A, and 0.05A * 5V = 0.25W.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is the power dissipated in the Ohm resistor?
Power dissipated is always Volts times Amps. W= V*I because of ohm's law, V=I*R, you can substitute either the voltage or amperage with the other value; W= V^2/R or W= I^2*R.
What is the power dissipated a resistor with a current of 0.02 amps and a resistance of 1000 ohms?
P = I^2 x R] P = 0.2^2 x 100 P = 4 W
How many amps does half hp motor single phase?
Presumably you mean 'rated full-load current'? The thing to remember is that motors, whether rated in horsepower (North America) or watts (practically everywhere else), are rated according to their output power. Because motors are not 100% efficient, the input power is always somewhat higherthan the output power. 0.5 horsepower is equivalent to about 373 W output power. If we assume that the motor runs at, say, 90% efficiency at its rated output, this means its input power will be around 414 W. To determine its input current you must then divide its input power by the rated supply voltage.
What does w or t mean on fuses?
I know the "T" stands for time-delay. Also known as a slow-blow fuse. Not sure about the "W"
Two lamps A and B are rated 60W 220V and 100W 220V respectively so why does the answer say that when connected in parallal bulb A is brighter?
In parallel, they both obviously have 220 v across them, so the 100 W bulb is obviously brighter than the 60 W one. The 60 W bulb has more resistance, and in series they both have to pass the same current, so the 60 W has more voltage across it and might be brighter.
What does W rated mean?
It will be PG 13
What is the function of a cement resistor?
A cement resistor is typically used as a power resistor (a resistor whose power rating is greater than 1 W).
Is a v rated tire better ride than a w rated tire or harder compound?
Neither is better. The V & W are speed ratings. V is rated to 149 mph and W is rated to 168 mph. The W rated tire will have a slightly harder compound. Stick with the V rated as it will provide a better ride.
What is the maximum current that a 100 Ω 2 W resistor can have without exceeding the rated power?
P=VI=I*R*I=I^2 R P=2 therefore I^2 =2/100 I=SQRT(1/50) = 0.14142 amps
What is the difference between a v rated tire and a w rated tire?
The V & W are speed ratings. V means the tire is rated up to 149 mph (240 km/h) W means it is rated up to 168 mph (270 km/h)
What is the time constant of a 20 mH inductor in series with a 230 W resistor?
t = L/R
What are the ratings and certificates for W - 1983 I?
W - 1983 I is rated/received certificates of: Finland:S
What are the ratings and certificates for W - 2014?
W - 2014 is rated/received certificates of: India:A
What are the ratings and certificates for W pustyni i w puszczy - 2002?
W pustyni i w puszczy - 2002 is rated/received certificates of: USA:Approved
What are the ratings and certificates for W pustyni i w puszczy - 1974?
W pustyni i w puszczy - 1974 is rated/received certificates of: Norway:7
What are the ratings and certificates for W pustyni i w puszczy - 1973?
W pustyni i w puszczy - 1973 is rated/received certificates of: Finland:K-8
What does the 91W on your tire mean?
AnswerThe W in 91W after the size code indicates a speed rating. While these tires are proably Z rated (speeds in excess of 149MPH) in the tire size the W indicates that the tires are rated to a higher speed. W and X were added since there were no guidelines about how much over 149 Z rated tires were good for.W indicates a top rated speed of 168MPH._____The "91" indicates load capacity per tire! You'll get about 1350lbs per tire.:)
