Transcript resistors

Resistors
Communication Systems
Reading the color stripes
Color stripes are printed at one end of
the insulating body, which is usually
tan.
 Reading from left to right, the first band
close to the edge gives the first digit in
the numerical value of R.

Cont.
The next band marks the second digit.
 The third band is the multiplier, which
gives the number of zeros after the two
digits.

Resistors under 10 ohms

for these values the third stripe is either
gold or silver, indicating a fractional
decimal multiplier.
Cont.
Gold = 0.1 & Silver = 0.01
 ***This is only when the gold or silver
colors are used as the third stripe. They
are more often used as the forth stripe.

Resistor Tolerance
The amount the actual resistor can
differ from the given code is called the
tolerance, usually given in percent.
 Gold stripe +/- 5%, Silver stripe +/10%.
 This is the amount above or below the
coded value.

Cont.
Ex. 10% of 2000 = 200, therefor
2000ohm with silver stripe can actually
be between
 1800 and2200ohm.
 If there is no fourth band the tolerance
is +/- 20%.

Closure:
I. Give the color code for 4.
 2. What tolerance does a silver stripe
have?
 3. Give the multiplier for red in the third
stripe.
 4. Yellow , violet, brown, gold
