what is the specification of a resistor?
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.
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.
994340
V(voltage)=I(current)*R(resistance)\n\nVoltage measured in volts\nCurrent measured in amps\nResistance measured in ohms.
632669
http://lakeaccess.org/russ/conductivity.htm
1103972
Hi,\n\nCarbon composition resistor is made of carbon granules mixture.\n\nCompared with other resistors, carbon composition resistor also has lower cost and wider resistance range in general than many other resistor types.\n\nYou may refer to this page to know more.\nhttp://www.kodkodkod.com/files/carbon_composite_resistor.htm\n\nKodKodKod Learning Consulting\nhttp://www.kodkodkod.com/index_files/submitquestion.htm
1170181
If the resistors are in series, then to find the equivalent resistance you just add up all the resistances.  6 + 12 + 18 = 36 Ohms\n\nTo find the current, you take V/R\n\n36 Volts / 36 Ohms  =  1 Ampere\n\nGood job on getting the right answer!
888374
Conductors allow electricity to flow through them with little resistance.  Resistors resist the flow of electricity.
232108
Ideally a capacitor has an infinite resistance (which is a DC measurement). However the AC equivalent of resistance, reactance (usually denoted as X), tells you how much AC current a capacitance passes with a given AC voltage applied across its terminals. Reactance depends on the AC frequency. It is X = 1/(C*W), where C is capacitance and W (omega) is 2*pi*frequency. Similarly to Ohm's law, you can find average current from E = I*X. Unlike Ohm's law, this is true for average current but not for instantaneous current, since E and I are 90 degrees out of phase.
80597
V = IR\nV---Voltage\nI--current\nR--- resistance\nIts also called ohm's law
209233
A potentiometer is a variable resistor used to attenuate a signal. It is an electronic component comprising two terminals connected to either end of a resistive element and a conductor that can be moved between the two ends, thus allowing the creation of a variable resistor or voltage divider. Potentiometers are most often rotary controls (such as volume controls), but also exist as linear controls, such as faders or sliders. Often called a "pot."
140136
Here's a study guide.  http://www.doctronics.co.uk/meter.htm
724810
The link above dosn't give any usefull info its some product manual.\n\nall of these components use semi-conductors.\n\nA light dependent resistor is basicly what it names sugests, (it resists more as the amount of light falling on the semi-conductor material inside it increases). These are used in street lights and other such things and can be connected to relays wich can turn on and off circuits.\n\nA diode use two types of semi-conductor n and p(this means one has many "holes" and the othere dosn't (a hole implys a bond without an electron)) which are doped to a have an electric field that only allows current to flow in only one direction, These are useful for protecting other components like micro chips from being burnt by wrong flowing charge.\n\nA transitor uses three chunks of semi conductor in pnp or npn order, each pin on the bottom of a transitor is attached to each chunk. The transitor varys amplifys a signal with a very small current so are commonly used in things like radios for converting the electro magnetic wave to a sound wave. Transitors are also used in micro chips where (with modern technology) many thousands can be fitted in a just a square millemeter.\n\nIm sorry if my explanation seems a little breif but  the guys from AT&T how first descreibed semi-conductors got a Nobel prise and so far i havnt even got a physics AS.
416710
The smaller the device's tolerence is, it will be of better quality. for example a resistor with a 5% tolerence will be closer to it's nominal value than a 10% one
210547
power=voltage^2/resistance\nhigher power means lower resistance.
765543
try\nhttp://www.dir.ca.gov/title8/2395_42.html\nsection b\n\nGrounds are also tied to the cold water pipes and gas pipes.\nmake sure all circuits are dry and checked with a insulation resistor tester (megger).Readings above 2 Mega Ohms should be OK.
709414
Your question is very confusing.  Among other things, resistors are used to limit or control the amount of current through a circuit.  If you know the required voltage drop across the resistor and the current through the resistor, Ohm's Law tells you to divide the voltage by the current to obtain the resistance in ohms.\n\nSay you have a light emitting diode (LED) that you want to power from a 5 volt power supply.  You put a resistor in series with the LED to control the current.  The voltage drop across the LED is about 0.7 volts, so the voltage across the resistor will be about 4.3 volts.  If you want 20 milliamperes to flow through the LED (and resistor), the required resistance is 4.3 volts divided by 0.020 amperes, or 215 ohms.  The nearest standard resistance value is 220 ohms, which is close enough.
348214
1.  not enough info\n2.  conduction?\n3.  conductor\n4.  resistance