90 volts are applied to a circuit with 3 resistors resistor 1=20 ohms resistor 2=40 ohms and resistor 3=60 ohms how much power will be dissipated by resistor 1
To calculate the power dissipated by a resistor in a circuit, you need two pieces of information: the voltage across the resistor and the resistance of the resistor. In this case, we have the voltage (90 volts) and the resistance value for resistor 1 (20 ohms).
To find the power dissipated by resistor 1, we can use the formula:
Power (P) = (Voltage^2) / Resistance
Plugging in the values, we get:
P = (90^2) / 20
To simplify the calculation, let's break it down step-by-step:
1. Calculate the square of the voltage: 90^2 = 8100
2. Divide the squared voltage by the resistance: 8100 / 20 = 405
Therefore, the power that will be dissipated by resistor 1 is 405 watts.