0
In order for a 30 volt 90 watt lamp to work properly in a 120 volt supply the required series resister in ohm is?
Wiki User
∙ 14y ago
A 30 volt 90 watt lamp has 3 amps going through it. The series resistor also has 3 amps going through it, by Kirchoff's current law. The voltage across the resistor is 90 volts. With 3 amps, that is 30 ohms. (By the way... The resistor must be rated to carry 270 watts. That is a lot of power for a resistor.)
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
How do the milliamp ratings of LEDs 20ma and a 12 volt 1000ma power supply figure into the resistor equations or do they not?
A: Since you know the current flow you need the voltage drop for this particular led at 20ma. All LED require a current and voltage to operate properly assuming a voltage drop of 2v then for a 12v source it becomes 12-2=10v 10v/.02=500 ohms in series to limit the current is required
Why a inductor is used in series before diode instead of resistor?
An inductor will supply better current source.
What happens when a solar cell cannot supply enough current to a circuit?
the circuit might not operate properly. but shouldn't effect the circuits them self.
Which AC input transformer required for 5volt dc output power supply?
It depends on the required output current, load rejection factor, and ripple. Also, efficiency enters into the picture.
Which way does DC power flow?
When you connect a load (motor, light bulb, etc.) in series with a power supply, current will flow, whether AC or DC depends on the power supply you are using.
What is the value of resister in 4-20ma transmitter at 24vdc power supply?
24 milli omps
Why remove resister from circuit to measure resistance?
a meter uses its own supply to measure resistance. you dont have to remove the resistor from the circuit but you must isolate it from the circuit supply to get an accurate reading.
What is food required to supply?
It is required to supply chemical energy, organic molecules, and essential nutrients
What is the supply requirement of 8086?
+5v of supply is required
Why series a resistor with a load for a DC supply circuit?
Good question on a linear power supply a load is not really required since it is nothing but a low band power amplifier. ON a switching type power supply a minimum load is always required so the PWM has something to control to. Also the soft start circuit may blowup waiting for feedback .Critical circuit since it operates for a very short time. however the load is in parallel not in series.
What the role of a resistor in an led circuit?
a resister is to RESIST current flow....if the LED gets the full effect of the power supply, the LED will immediately blow out.
How do you connect an ammeter and voltmeter?
The voltmeter is connected across the supply and the ammeter is connected in series with the supply.
Is a stop switch wired in series?
A stop switch is wired in series with the power supply and the load.
Need help solving this arethmetic series?
There are no example metric series in the question on which to supply a possible answer.
You are a freelance writer are your clients required to supply workers comp to you?
NO
What pipe is wholesome water required to be supplied from?
Supply pipe
What happen Two power supply in series?
See discuss.
