symbols of fixed resistors
If you cant find a spec sheet, take out a multi meter, set it to ohm mode and measure the thing. If its a variable find something in the same range, if its fixed you should be able to find a suitable replacement. If its a big resistor make sure you get a power resistor and not a standard ceramic one.
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The symbol for a wire is simply a line between circuit elements. The symbol for a resistor is a squiggly line. The related link goes directly to a picture of the symbol.
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.
possibly use a potentiometre
its the colour of the fixed and the variable we define it by its power and name
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.
To limit the current
A variable resistor means that the resistance can be varied, usually by using a slide. A fixed resistor can not be varied.
those are the fixed resistor...u can't change their values..
Scroll down to related links and look at "Symbols for a resistor".
Resistance is measured in ohms.
Put the resistor symbol ie zig zag. Then put a crossing line with arrow headed at the top.
Scroll down to related links and look at "Resistor symbols".
Where would you find a material which is a resistor? You can find a resistor material in Europe
-------------[_________]-------------- and put a line on the top of the box
zero