How do you find a replacement resistor?
How do you find a replacement resistor? Connect resistor to multimeter and measure voltage drop across the burnt resistor. Now measure the current flowing into the resistor. Multiply both values and you will get the wattage of Resistor (As P = VI i.e. Ohm's law). This wattage must be less than the wattage of the resistor being replaced. Can the value of fixed resistors be changed? Fixed resistors have a certain amount of resistance and cannot be changed. They are available in a wide range of varying resistances. What can I use if I don't have the right resistor? Sometimes...