the sensitivity of potentiometer depends on?
819326
For wire wound potentiometers, it depends on the number of turns more turns - higher sensitivity.\nFor conductive rubber potentiometers, the sensitivity is very high
591593
Voltmeter measures the potential difference and a potentiometer measures the EMF. Voltmeter is a converted galvanometer. Potentiometer is accurate and nullifies internal resistance. It does so as it is based on the principle of Wheatstone's Bridge ( P/Q= R/S)\nThis is an outline. Try google for schematic diagrams and other detailed stuff like construction etc.
155881
Watts are directly in realtion to Ohms, hence a 120 watt bulb should have more Ohm resistance. The resistance in the fillimant is what creates the heat and light of the bulb, by friction of electrons or something along those lines.
892848
One of the most frequently used is E=IR    ;E =voltage    I=current   R= resistance. U can change this every way depending on the unknown.\n    Good luck
86126
Suppose you are using an instrument to measure say voltage. The instrument is a voltmeter. Now, you need to be sure that if you apply a 1 volt input, you get a 1 volt output. IF your instrument does not give you an output of 1 Volt, then you need to 'calibrate' it. In other words, you must adjust certain settings of the instrument so that 1 volt input gives you 1 volt output. The same also applies to other kinds of measuring instruments
455603
If it's for a simple hobbyist application they need to know only the resistance value and its power rating.\n\nA full specification would also include:\n\ntolerance,  thermal coefficient,  maximum voltage.
593819
It appears that the constants are calculated at one condition (dry,wet,etc) whereas the effective is closer to reality.  See\n\nhttp://www.pnas.org/cgi/content/full/102/45/16293
606166
depends on the voltage
434893
The pot's resolution is a function of its type and quality.  You can't change it.\n\nYou can, however, connect another pot of, say, one tenth the value of the first one in series with it as a variable R.  That will give you a fine adjustment.\n\nOr you can feed the pot's wiper to another pot and use it as a fine control.
981166
I assume that you mean that the resistance of the solution kkeps rising with time. If you are using a Dc based system, then depending on the conductivity (1 over the resistance) electrolysis products may be building up at the electrodes and increasing the resistance. A yourself a good conductivity meter and this should eliminate the problem.\n\nThe resistance of a solution will dpend on the area of your electrodes, the distance bewteen them ,the concentration of dissolved salts in the water and the solution temperature. You will have a few things you will need to keep standard.
82587
You guys are both right--good answers.  Junction temperature also can affect the voltage drop.
913372
It doesn't really have one. Its just a useful way of characterising the battery's behaviour.\n\nBatteries approximate to perfect voltage sources - in other words, the voltage across them does not drop no matter how much current you draw. (By contrast, solar cells approximate to perfect current sources).\n\nOf course, in reality the voltage does drop a little, and drops more the more current is drawn. The relationship is almost a straight line for small currents, and so it is useful to know the rate the voltage drops as the current increases, or dV/dI. Now of course the units of volts/amps is ohms.\n\nWhere this relationship is linear (small currents) you can also usefully include the internal resistance as a fictitious resitance in a circuit - it will do just as well as accounting for the change in voltage (can you see why?).
264133
Resistance of an object is its capability to resist the flow of electricty through it. For the same amount of potential difference applied acreoss the ends of objects of different resistance, there will be less electric current flowing through the object with higher resistance.\n\nIf I = Current, V = Potential Difference, and R = Resistance:\n\nI = V/R\n\nResistance of an object depends on:\n\n- The material that object is made of.\n- Its size and shape.
249398
I suppose you are reffering to the small digital scales. They have a device whos electrical resistance changes under pressure.
701756
Resistance, R, is converted to conductance, G, by inversion. \nG = 1/R. The unit was called mho (ohm spelled backwards) when I went to school. But the unit name was changed to Siemens (the symbol is S) when the SI unit changes were made. \n\nSo just take all your readings and do a 1/x calculation with your calculator. And put an S after each result for the unit.\n\nIncidentally, ohmmeters are not very accurate with measurements of such low resistance. The test leads probably have resistance of something like .3 ohms.
745468
Easy!\nIf the input is the same(1.1kW) it depends on their performance.
826531
tiny amounts of chemical can stick to differnt things, like stir bar, stir rod, thermometer and if you remove these items before the experiment is over then you remove some chemicals.  Other kinetics events that your not considering. as in pressure, humididtym and so on.  If you used a Ph probe then maybe it wasn't calibrated right or isn't properly maintained