A pack of resistorsA few types of resistorsConstruction of a wire-wound variable resistor. The resistive element (1) is trapezoidal, giving a non-linear relationship between resistance and turn angleThis image shows some surface mount resistors, including two zero ohm resistors. Wire links are often made with zero ohm resistors, so they can be inserted by a resistor-inserting machine.
Get best deals from a huge selection of musical instruments and equipment including DJ gears, guitars, string, brass, keyboards, woodwind, percussion, harmonica, and musical instruction books, CDs.

Electric Beginner Packs

A resistor is a two-terminal electrical or electronic component that resists an electric current by producing a voltage drop between its terminals in accordance with Ohm's law. more...

Home
Brass
DJ Gear & Lighting
Electronic
Equipment
Guitar
Acoustic
Acoustic Beginner Packs
Acoustic Electric
Amplifiers
Bass
Builder, Luthier Kits
Electric
Electric Beginner Packs
Memorabilia
Other Guitar
Parts, Accessories
Vintage, Pre-1980
Harmonica
Instruction Books, CDs,...
Keyboard, Piano
Other Instruments
Percussion
Pro Audio
Sheet Music, Song Books
String
Wholesale Lots
Woodwind
The electrical resistance is equal to the voltage drop across the resistor divided by the current that is flowing through the resistor. Resistors are used as part of electrical networks and electronic circuits.

Applications

  • In general, a resistor is used to create a known voltage-to-current ratio in an electric circuit. If the current in a circuit is known, then a resistor can be used to create a known potential difference proportional to that current. Conversely, if the potential difference between two points in a circuit is known, a resistor can be used to create a known current proportional to that difference.
  • Current-limiting. By placing a resistor in series with another component, such as a light-emitting diode, the current through that component is reduced to a known safe value.
  • An attenuator is a network of two or more resistors (a voltage divider) used to reduce the voltage of a signal.
  • A line terminator is a resistor at the end of a transmission line or daisy chain bus (such as in SCSI), designed to match impedance and hence minimize reflections of the signal.
  • All resistors dissipate heat. This is the principle behind electric heaters.

The ideal resistor

The SI unit of electrical resistance is the ohm (Ω). A component has a resistance of 1 Ω if a voltage of 1 volt across the component results in a current of 1 ampere, or amp, which is equivalent to a flow of one coulomb of electrical charge (approximately 6.241506 × 1018 electrons) per second. The multiples kiloohm (1 kΩ = 1000 Ω) and megaohm (1 MΩ = 106 Ω) are also commonly used.

In an ideal resistor, the resistance remains constant regardless of the applied voltage or current flowing through the device or the rate of change of the current. While real resistors cannot attain this goal, they are designed to present little variation in electrical resistance when subjected to these changes, or to changing temperature and other environmental factors.

Nonideal characteristics

A resistor has a maximum working voltage and current above which the resistance may change (drastically, in some cases) or the resistor may be physically damaged (overheat or burn up, for instance). Although some resistors have specified voltage and current ratings, most are rated with a maximum power which is determined by the physical size. Common power ratings for carbon composition and metal-film resistors are 1/8 watt, 1/4 watt, and 1/2 watt. Metal-film and carbon film resistors are more stable than carbon resistors against temperature changes and age. Larger resistors are able to dissipate more heat because of their larger surface area. Wire-wound and resistors embedded in sand (ceramic) are used when a high power rating is required.

Read more at Wikipedia.org


St electric guitar pack kit amp 10w,strap, bag,cable $99.00 New Electric Guitar Amp Beginner Starter Package Kit $99.99
Black 3/4 Child Electric Guitar w/Amp set+Gig Bag+Cable $84.95 Giraffe Child Electric Guitar set 1/4 size+Built-in Amp $49.95
New Electric Guitar by Glen Burton Met.Red Pkg $195.00 Ibanez Ijx40 Electric Guitar Package Jewel Blue In Box! $194.99
30" Electronic Guitar with Built-In Amplifier $29.00 Natural Electric guitar w/amp 10w combo set+gig bag New $99.95
Gibson Red Solid Body Mini Electric Flying V Guitar $29.99 Blue Metallic Electric Guitar and 10w Amp Package+New $99.95
Red Electric Aria Guitar Beginner Pack! $60.00 Ibanez Ijm21 Electric Guitar Mikro Jumpstart Pack New $194.99
Silver full size electric guitar+10w amp set amplifier $89.95 Pink Electric Guitar and 10w Amp Package+more+New $99.95
Zebra Stripe Child Electric Guitar+Amp set 1/4 size New $89.95 Red 1/2 Size Kids Electric Guitar set+Amplifier junior $109.95
Red Sunburst Electric Guitar+10w Amp Package+New-black $154.95 Ibanez Electric Guitar $203.51
New Sunburst 39 Electric Guitar W Case Bag Amp Cord $66.91 31" Kids Black Electric Guitar And Amp Kit New In Box! $89.99
31" Kids Purple Electric Guitar And Amp Kit New In Box! $89.99 black 1/2 Size Kids Electric Guitar set+Amplifier half $109.95
White Electric Guitar Set-gig bag+eBook+strap+cord-New! $49.95 Daisy Rock - Rock Candy Guitar with amp, (Atomic Pink) $149.95
Child Electric Guitar+Amp set Black kids 1/4 size New ! $99.95 Child Electric Guitar+Amp set Red kids 1/4 size New rd $99.95
Zebra Electric Guitar+10w Amp Package+New-black white $99.95 Silvertone Gibson-Style Cherry Sunburst Electric Guitar $250.00
St Kit electric Bass guitar pack 20 W amp $159.00 Nib New Behringer V Tone Guitar Pack $99.00
Gibson Baldwin Epoch Electric Lp Les Paul Style Guitar $99.99 Fender Starcaster Strat Pack - New Candy Apple Red L@@K $248.99
Ibanez Ijx40 JumpStart Electric Guitar/Amp Red In Box $239.99 Washburn Little Lyon 1/2 Size Electric Guitar Package ! $69.99
New Washburn 3/4 Electric Guitar Camp Rock Edition $69.99
Click to see more Electric Beginner Packs items
Prices current as of last update, 01/06/09 12:06am.


Home Contact Resources Exchange Links eBay