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Can a fixed resistor be used as a dimmer in a lighting circuit and if no what can be?
Wiki User
∙ 13y ago
No. A fixed resistor cannot be used as a dimmer in a lighting circuit. Depending on the dimming setting, you would need to dissipate substantial power across the resistor. What you need instead is some kind of pulse width modulated device, such as an SCR or TRIAC, or switching power supply, that does not dissipate a lot of power when it is turned on, because it operates in saturated mode, but the average power delivered to the load is what you want it to be.
Wiki User
∙ 13y ago
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Find the symbol of fixed resistor?
symbols of fixed resistors
In a series circuit each device that is added to the circuit decreases the what?
Depends on the device. If it is a resistor and you have a fixed voltage then the circuit will obey Ohms law. Voltage = Current x Resistance. So if R increases by adding more resistors in series and the voltage is constant, the current will decrease.
What is the purpose of the colors bands on a fixed resistor?
hoy unga why hack mediocres you dirty
What are the applications of fixed bias amplifier circuit?
low input impedance
Why fixed bias circuit is called so?
because we are not varying the biasing voltage
What does a fixed resistor do in a circuit?
It resist the flow of current according to the resistance value.
What is the meaning of resistor?
Resistors are one of the three basic electronic components. They restrict the flow of current in an electrical circuit. Fixed resistors have a fixed value of resistance, and are used in almost every electronic circuit for lots of different reasons.
What is a fixed bias circuit?
it is a switching device that need a current..so u will need a resistor to open the switch..
Will a circuit work if the resistance of the fixed resistor is larger than the resistance value of the thermistor?
In order to answer that, one would need to know what the circuit is designed to do (so that he would know how to tell when the circuit is "working"), and would also need to see the schematic diagram, in order to know exactly how the fixed resistor and the thermistor are configured in the circuit, and what other components are involved. Consider . . . If I came up to you on the street, or even for that matter in an Engineering lab, and I said to you "I've got a circuit with a coil and a resistor in it. Will it work if the impedance of the coil is greater than the resistance of the resistor ?", you would most certainly find yourself at a loss, just as I do when I read your question.
What is resistor function?
In an electronic circuit power supply voltage is generally fixed. Resistors is a current limiter for correct devices polarization.
Why you use resistor with variable resistor?
Often we want to easily change a resistor value, so we use a variable resistor. For example, we may want to change the resistor that controls the power sent to a LED, so we can easily make it brighter or dimmer. Often if we use a variable resistor, there is only a very narrow range that is useful. Continuing our example, sometimes we use several LEDs, and we use the variable resistor to set them all to the same brightness. In this case, the resistance range that sets the LED to be twice as bright as the the other LEDs, and the resistance range that sends so much power to the LED that it is permanently destroyed is even less useful. So we add a fixed resistor in series with the variable resistor -- the fixed resistor sets the minimum net resistance, no matter how we turn the knob on the variable resistor. In our example, the addition of the fixed resistor allows us to turn the variable resistor throughout its whole range, and the LED gets brighter and dimmer; without that resistor, a certain range of the knob on the variable resistor would allow so much power to go to the LED that it would be destroyed.
What is the difference between a fixed resistor and a variable resistor?
its the colour of the fixed and the variable we define it by its power and name
DC voltage of 120 volts is feeding series circuit consisting of 2-ohm 6-ohm and 8-ohm regular resistors a variable resistor For line ammeter to indicate 1.5 amp the variable resistor must be fixed?
If the DC voltage of 120 volts is feeding series circuit consisting of 2-ohm, 6-ohm, and 8-ohm regular resistors, the variable resistor for line ammeter to indicate 1.5 amp, the variable resistor must be fixed before the amp.
Find the symbol of fixed resistor?
symbols of fixed resistors
Difference between variable and fixed resistor?
Variable resistors means that a resistor which can change its resistance by control by any person or it self and fixed resistor means that it can not change its value.
02 jeep GC. I fixed wiring harnass for heater then fixed resistor then i am told that the blower motor is causing the resistor and harnass to burn. Is this possible. Do i have to replace all 3?
Yes, the blower tends to draw too many amps. Too many amps in the circuit will overheat the wires and connecters and melt them.
In a series circuit each device that is added to the circuit decreases the what?
Depends on the device. If it is a resistor and you have a fixed voltage then the circuit will obey Ohms law. Voltage = Current x Resistance. So if R increases by adding more resistors in series and the voltage is constant, the current will decrease.
