Method: 1
Scarp the external covering.
Clean the Burnt Section of the resistor.
Measure protection from one end of the resistor to the harmed segment.
Again measure the protection from harmed segment to the opposite end of the resistor.
Include these two esteem f protections.
This is the inexact estimation of Burnt resistor.
Simply include a little estimation of protection for harmed segment i.e., assume the estimation of consumed resistor was 1k Ω, however you got 970 Ω. So simply include 30 Ω, and you will have 1k Ω.
Method: 2
This strategy can likewise be utilized for finding the estimation of consumed resistor(s) (additionally, might be connected on associated resistors in the circuit) on the off chance that on the off chance that you don't think about Resistance Color Coding.
Associate Resistor to Multimeter and measure voltage drop over the consumed Resistor.
Presently measure the present streaming into the resistor.
Increase the two esteems and you will get the wattage of Resistor (As P = VI i.e. Ohm's law).
This Wattage must be not as much as the wattage of the resistor being supplanted.
Method: 3
This strategy could be utilized better in the event that you know the normal Output Voltage of the circuit and you have an arrangement of resistors of an indistinguishable wattage from consumed resistor. Play out this technique on the off chance that you don't have the foggiest idea about the estimation of resistor.
Begin with a high estimation of protection and incidentally associate this resistor rather than consumed resistor.
Measure the normal yield voltage of the circuit. In the event that you acquired same voltage of course voltage then you have done.
In the event that you don't think about the normal voltage, at that point continue diminishing the estimation of resistor until the point when you fulfill with crafted by circuit for which reason it was intended for.