I connected several resistors in series in a circuit to get a certain resistance because it did not have a single resistor of the desired value. However, I notice that they heat up differently and one of them warms up more. What is wrong?
There is nothing wrong. In an association of resistors of different values in series, all resistors are driven by the same current, however the voltage divides unequally between them and with that, the larger resistor dissipates the higher power. When different value resistors are connected in series, it is convenient to calculate the dissipated power, mainly by the larger one. The formula is:
P = R x I2
At where:
P is the power dissipated
R is the resistance of the resistor
I is the current that travels through the resistor and therefore the
The current in the association will be given by:
I = V / R
At where:
I is the current in the association
V is the voltage applied to the
R is the resistance equivalent to the association.
