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Modifica in base a David Hodson-

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[* black] So, what are resistors, and why do we care about them? Resistors are components used in circuitry to control the amount of current flow. The more resistance (measured in Ohms) a resistor hashas (measured in Ohms), the less current it allows to flow.
[* black] The colored bands on a resistor are the key to determining the resistance of that particular resistor. A [http://www.bcdxc.org/resistor_color_codes.htm|resistor color code chart] will come in handy here.
[* black] If there are four bands on your resistor, the first band to locate is the red, gold, or silver band on one of the swollen ends; these are called tolerance bands. Since our resistors have gold bands, then we know the actual resistance is within ±5% of the nominal value
[* black] Next, you can readThe next step is to determine the resistance. All readings are in Ohmsnominal value of your resistor. Starting with the band onat the opposite endside of the tolerance band, you read inwards with each band color indicating a specific number until you only have one band and moving from left before the tolerance band. In both resistors, theto right, there are three colored bands. The first two color bands are yellow then violet, indicating [http://www.bcdxc.org/resistor_color_codes.htm|2 then 7] for thecorrespond to a number 27. The last band before the tolerance is the multiplier. For the first one (left)(0-9), and the third band is red indicating x100. For the second (right) it is brown indicating x10multiplier band, which corresponds to a specific power of 10.
[* black] From all of thisLooking at the top resistor shown, we read these as 270see yellow, violet, and 2700 Ohm resistors +/- 5 percent.red bands. Consulting a resistor color code chart shows us that those correspond to 4, 7, and 100, respectively, giving us a nominal resistance of 4,700 Ohms.
[* icon_note] Can you determine the resistance of the bottom resistor?
[* black] So, what are resistors, and why do we care about them? Resistors are components used in circuitry to control the amount of current flow. The more resistance (measured in Ohms) a resistor hashas (measured in Ohms), the less current it allows to flow.
[* black] The colored bands on a resistor are the key to determining the resistance of that particular resistor. A [http://www.bcdxc.org/resistor_color_codes.htm|resistor color code chart] will come in handy here.
[* black] If there are four bands on your resistor, the first band to locate is the red, gold, or silver band on one of the swollen ends; these are called tolerance bands. Since our resistors have gold bands, then we know the actual resistance is within ±5% of the nominal value
[* black] Next, you can readThe next step is to determine the resistance. All readings are in Ohmsnominal value of your resistor. Starting with the band onat the opposite endside of the tolerance band, you read inwards with each band color indicating a specific number until you only have one band and moving from left before the tolerance band. In both resistors, theto right, there are three colored bands. The first two color bands are yellow then violet, indicating [http://www.bcdxc.org/resistor_color_codes.htm|2 then 7] for thecorrespond to a number 27. The last band before the tolerance is the multiplier. For the first one (left)(0-9), and the third band is red indicating x100. For the second (right) it is brown indicating x10multiplier band, which corresponds to a specific power of 10.
[* black] From all of thisLooking at the top resistor shown, we read these as 270see yellow, violet, and 2700 Ohm resistors +/- 5 percent.red bands. Consulting a resistor color code chart shows us that those correspond to 4, 7, and 100, respectively, giving us a nominal resistance of 4,700 Ohms.
[* icon_note] Can you determine the resistance of the bottom resistor?