How can tell the resistance of a resistor?

Answer 1

Resistors are electronic segments. They are shading coded with stripes to uncover their resistance esteem measured in ohms and additionally their assembling resilience. There are two sorts of shading codes, four band and five band. To begin with, the four band. Discover the resilience band, commonly it will be gold. Beginning from the flip side, distinguish the first band ,record the number connected with that shading; for this situation accept the shading is Blue, in this way the number is 6. here accept it is red, so record a "2" beside the six. Presently read the third or "multiplier" band and record that number of zeros. In the event that the "multiplier" band is Black don't record any zeros. On the off chance that the "multiplier" band is Gold move the decimal point one to one side.

In the event that the resistor has one more band past the resilience band it is a quality band. Perused the number as the '% Failure rate per 1000 hour'. This is evaluated accepting full wattage being connected to the resistors.

1% resistors have three groups to peruse digits to one side of the multiplier. They have an alternate temperature coefficient keeping in mind the end goal to give the 1% resilience. Should you experience a resistor and don't have a clue about the shading codes, utilize this edge page above to decide its resistance esteem.

Answer 2

You can measure it with a meter or calculate it by using Ohm's Law. Ohm's Law has four variables and with only two input variables you can calculate the remaining one or even two unknown variables.

Watts or Power=P; Volts or Electricity=E;

Amperes or Current=I; Ohms or Resistance=R. (Below are formulas for R):

R=Ohms can be calculated by (E divided by I); (E2 divided by P) or,

(P divided by I2). (See Ohm's Law formulas to calculate remaining three variables: P; E; or I).

Answer 3

Use an ohmmeter, or look at the colored bands on the resistor - if you do an internet search for "resistor color code" you can find a chart to help.