Question

What is a power dissipated?​

Answer 1

Answer:

Any resistor in a circuit that has a voltage drop across it dissipates electrical power. This electrical power is converted into heat energy hence all resistors have a power rating. This is the maximum power that can be dissipated from the resistor without it burning out. The rate of conversion is the power of dissipation.

Definition

Power Dissipated in a resistor

Using the formula for electrical power: . but and thus substituting in the equation for electrical power . This also works substituting , giving .

Example

Calculate the power dissipated in a 10k resistor with a 5mA current through the resistor.

Using .

p = (5*10-3)2 * 10 * 103

p = 250mW.

i.e. The power dissipated in the resistor is 250mW.

Answer 2

Answer:

Definition:

The process in which an electric or electronic device produces heat (other waste energy) as an unwanted byproduct of its primary action. Central processing unit power dissipation is a central concern in computer architecture.

How is power dissisipated? If a current I flows through through a given element in your circuit, losing voltage V in the process, then the power dissipated by that circuit element is the product of that current and voltage: P = I × V.

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