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A resistor is any material that exhibits a resistance. Although copper wire is very low resistance, there is still an element of resitance. Other wire has higher resistance and high power resistors are often made from a coilf of wire. Most resistors use carbon to provide the resistive path. Newer products include plastics, doped with metal. The faders on expensive sound mixers use plastic resistors because they are very stable, hardwearing and tend not to suffer from the crackling noise that volume controls sometimes generate as they get older.
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Describe the purpose of the coloured bands on a resistor?
The purpose of colored bands on a resistor is to tell whoever is installing the resistor the amount of resistance that particuliar resistor has.
What is an axial lead resistor?
It's a resistor where the leads (wires) are axial (they come in at the center of each end of the resistor).
What is the rule for voltage across each resistor?
Volt across a resistor = resistance x current through the resistor.
How does the filament in a light bulb work?
it is made of tungsten and is a resistor when current flows thru it it heats up and glows
The voltage drop across a resistor is 1.0 V for a current of 3.0 A in the resistor what is the current that will produce a voltage drop of 9.0 V across the resistor?
The resistor is 1/3 of an ohm. A 9 volt drop across the resistor would cause a draw of 27 amps through the resistor. The wattage you would need for that resistor is at least a 243 watts.
Who made the first resistor?
Otis f.boykin made and invented first the resistor
Where is the resistor in an electric stove?
What is a electric stove resistor made
When and by who were resistors made?
Otis F. Boykin invented the wire precision resistor and the electrical resistor. In June 1959, he got the first patent for the wire precision resistor and in June 1965, he got his patent for the electrical resistor.
What ia a ballast resistor made of?
Fe(71%) and Ni(29%) alloy
Swamping resistor is made up of?
Swamping resistor is mostly made of manganin or constantan because these materials have temperature coefficients very close to zero thus there is a very less change in the resistance of these materials with change in temperature.
What are resistors in IC made of?
Resistor in IC are made of semiconductor structures in a manner similar to transistors and PN junctions
Is it true that the higher a resistance value the higher the voltage drop?
Greater value resistor will absorb more voltage than smaller value. The more voltage absorb with same value current flow, the larger body mass resistor will require. Body size depends on type of resistor (material resistor is made of).
Is Light dependent resistor an example of resistor?
yes, a variable resistor
In roughness measureing system what is RMS value?
RMS value is defined as "The amount of ac supply required to make same heat effect in resistor , which is made by dc current, in that resistor"
What is the meaning of load resistance?
"Load resistor" is a discriptor, not a value. Any resistor can be a load resistor if it is the proper value and power for your application. So if you want a load resistor by itself, that makes no sense. A load resistor is a resistor selected for a specific purpose. For example, it you want to put a load on an audio amplifier made to drive an 8 ohm speaker to 50 watts, then your load resistor would be a 8 ohm 50 watt resistor. If you want a load resistor to terminate a 50 ohm line, you would need a 50 ohm resistor, although in this case, you probably want one that is part of a co-ax connector. A load resistor for an op-amp output is typically 2k, since most op-amps are rated for 10 volts at 5 mA. Etc, etc.
If resistor X has the same length and is made of the same material as resistor Y but has twice the diameter. Resistor X has the blank resistance of resistor Y?
R = r*L/A where: R = resistance r = material resistivity L = length A = area Since you are doubling the diameter, you are increasing the area by a factor of 4, so Y will have 1/4 the resistance of X.
Who invented the resistor?
Otis F. Boykin invented the wire precision resistor and the electrical resistor.
