How can I know the resistence of a semiconductor through its colors?
406914
While semiconductors do have a resistance, you can't read it by color. It isn't even constant, which is what makes semiconductors so useful. \n\nResistors, which are not semiconductors, are often marked with a color code that can be read this way:
366793
lots of materials' properties can be found. you can try this link..
244068
The conducting ink forms a resistor which does load the battery.  The thermochromic strip lies along the resistor and responds to the heat it generates.  The resistor is tapered, so its resistance per unit length increases as it gets narrower, and so does the temperature due to current flow.  The point along the strip where the temperature reaches the color-change value depends on the amount of current flowing in the resistor.  Thus the length of the changed color section indicates battery freshness.  This is a very approximate test.  A better tester loads the battery similarly, but measures the battery voltage under such loading.
920352
Did you measure the absorbance of a standard in addition to the unknown sample?\n\nIf so, you could plug the values into (As / Au) = (Cs / Cu)\nWhere\nAs = Absorbance of the Standard\nAu = Absorbance of the Unknown\nCs = Concentration of the Standard\nCu = Concentration of the Unknown?\n\nAlternatively, did you get a value for the molar absorptivity of PNP at the wavelength you used? \nIf so, you could plug it into\n\nA = (epsilon)(b)(c)\n\nWhere\nepsilon is the molar absorptivity,\nb is the length of the path through which the light passed,\nc is the concentration of the chromogenic substance.\n\nAnd you could rearrange that to solve for c.\n\nHope it helps
83712
http://en.wikipedia.org/wiki/Color\n\nThis might help out.
632669
http://lakeaccess.org/russ/conductivity.htm
390838
To know whether it is a metal you can check its electrical conductivity. To know whether it is specifically palladium you can use mass spectrometer or a x-ray diffraction measurement.
231710
its electrical properties
825026
what you need to do, get a SI data book, and look up their natural state. not bonded with anything else, and possibly itself.\n\nPhophorus - white: molecular (P4). red: Chain. Black: Layer\nIodine - molecular (I2)\nMagnesium - hexagonal closest-packing\nNeon - cubic closest-packing\nArsenic -grey: 3d structure - Layer formation. yellow: molecular As4\nSulfur- molecular S8\nBoron - complicated structure.\nSelenium - grey: chain, Red: molecular: Se8\nGallium - Complicated\nCesium - body-centred cubic\nOxxygen - O2, O3 molecular
1116573
The resistance of living cells depends on the mineral content in them like K+, Na+ etc. In order to study it, take two metal elcetrodes and measure the resistance of fruit pulp. You can get the mineral content of th pulps from standard charts. Compile your data draw graphs and derive your conclusions.
1117774
Below are the color codings with voltage and their purposes.\n\nWire Color    :::::::::    Voltage Use\n----------------------------------------------------------------\nRed +5V                  : Motherboard, adapter cards,\nWhite -5V                : Logic circuits (rarely used)\nYellow +12V             : Disk drive motors, RS-232 serial\n\nBlue -12V                  :RS-232 serial port, fans\nOrange n/a               :Power OK signal\nBlack 0V                   :Ground (GND)
162059
Knowing the number of electrons present in the outer shell and  valence of each oxygen molecule.\n\nBesides there are techniques which actually helps us to visualize electrons like electron density map.\n\nHope this helps.
616704
pie   p power = i current x e voltage\n      e = i x r resistance
501994
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/posfe.html#c3\n\nThe link above may be of some help. Input the values you want or need.
979836
All elemets will give of colors when excited enough. Some take extremely high energy. Elements can be idntified by these colors. Some elements give off their colors easily, such as the metals in column 1 and 2 and copper. When placed in a flame the outer electrons jump to a higher energy level and when they fall back they fall a specific distance or wavelength. . We see it as the color we perceive.
130727
RED (Even if it can reflect all the colors, you are not sending them to the object)
21069
Photosensitive resistors (or Light Intensity / Light Dependant Resistors) vary according to the amount of light that falls on the actual resistor.  \n\nThe included source below expresses resistance as:\nResistance = 500 / (Light Intensity) Kohm\n\nI think this can vary with the particular LDR used though.