AceOfHearts
New Member
Hi everyone,
I just want to be clear on resistor power rating issue.
I'll explain how I understand it as of now, and I will be grateful if someone can verify it for me.
A voltage is applied across a resistor. A current of I=V/R flows through it. The power dissipated in the resistor is P=(I^2)/R which must not exceed the power rating of the resistor. Thus, we can say that we can ensure we dont exceed the power rating by having lower current through the resistor which can be achieved by reducing the voltage V, or increasing the resistance R for a given power rating.
Clafication / more detail is welcomed.
Thanks for reading.
I just want to be clear on resistor power rating issue.
I'll explain how I understand it as of now, and I will be grateful if someone can verify it for me.
A voltage is applied across a resistor. A current of I=V/R flows through it. The power dissipated in the resistor is P=(I^2)/R which must not exceed the power rating of the resistor. Thus, we can say that we can ensure we dont exceed the power rating by having lower current through the resistor which can be achieved by reducing the voltage V, or increasing the resistance R for a given power rating.
Clafication / more detail is welcomed.
Thanks for reading.