How many watts are in 30 ohms?

Answer 1

Without specific information I cannot answer your question, however you can work it out.

For a dc or single phase system you need to know 2 simple laws. P=V x I & V=I x R

where:

P = power in watts

V = Voltage in Volts

I = Current in Amps

R=Resistance in Ohms

we can therefore derive that since I=V/R and P=V x I then P=V x V/R or vsquared over R

or in your case R = V(squared) / P = 12 x 12 / 30 = 144/30 = 4.8 ohms

Now use the formula supplied with your voltage value, and you will know what the resistance is .

See isn't math fun.

Answer 2

Watts is a measure of power and Ohms is a measure of resistance. A resistor has a maximum rating in watts, but you need to know either the voltage across the resistor or the current through the resistor to compute wattage.

Watts = Volts x Amps

Volts = Amps x Ohms

Answer 3

There is no way to tell, you don't have enough information.

Watts are what you get by multiplying the amps x the voltage. Simply put, Volts X Amps = Watts.