How do you calculate the power dissipated in a resistor?
1 Answer
The power dissipated in a resistor can be calculated using Ohm's Law and the formula for power:
Ohm's Law states: V = I * R
Where:
V is the voltage across the resistor (in volts)
I is the current flowing through the resistor (in amperes or amps)
R is the resistance of the resistor (in ohms)
The formula for power in an electrical circuit is: P = I * V
Where:
P is the power (in watts)
I is the current (in amps)
V is the voltage (in volts)
Since V = I * R, you can substitute this value of V in the power formula:
P = I * (I * R)
P = I^2 * R
So, the formula for calculating power dissipated in a resistor is:
P = I^2 * R
Keep in mind the units:
Power (P) is measured in watts (W).
Current (I) is measured in amperes (A).
Resistance (R) is measured in ohms (Ω).
To calculate the power dissipated in a resistor, you need to know the value of the resistance and the current flowing through it. Plug those values into the formula, and you'll get the power in watts.
Ohm's Law states: V = I * R
Where:
V is the voltage across the resistor (in volts)
I is the current flowing through the resistor (in amperes or amps)
R is the resistance of the resistor (in ohms)
The formula for power in an electrical circuit is: P = I * V
Where:
P is the power (in watts)
I is the current (in amps)
V is the voltage (in volts)
Since V = I * R, you can substitute this value of V in the power formula:
P = I * (I * R)
P = I^2 * R
So, the formula for calculating power dissipated in a resistor is:
P = I^2 * R
Keep in mind the units:
Power (P) is measured in watts (W).
Current (I) is measured in amperes (A).
Resistance (R) is measured in ohms (Ω).
To calculate the power dissipated in a resistor, you need to know the value of the resistance and the current flowing through it. Plug those values into the formula, and you'll get the power in watts.