How do you calculate the total power in a resistive AC circuit?
Practice Questions
1 question
Q1
How do you calculate the total power in a resistive AC circuit?
P = V^2 / R
P = I^2 * R
P = V * I * cos(φ)
P = R * I
In a resistive AC circuit, the total power (P) can be calculated using the formula P = V * I * cos(φ), where φ is the phase angle between voltage and current.
Questions & Step-by-step Solutions
1 item
Q
Q: How do you calculate the total power in a resistive AC circuit?
Solution: In a resistive AC circuit, the total power (P) can be calculated using the formula P = V * I * cos(φ), where φ is the phase angle between voltage and current.
Steps: 4
Step 1: Identify the voltage (V) in the circuit. This is the electrical potential difference measured in volts.
Step 2: Identify the current (I) flowing through the circuit. This is the flow of electric charge measured in amperes.
Step 3: Determine the phase angle (φ) between the voltage and current. In a purely resistive circuit, this angle is 0 degrees, so cos(φ) = 1.
Step 4: Use the formula P = V * I * cos(φ) to calculate the total power. Since cos(φ) is 1 in a resistive circuit, the formula simplifies to P = V * I.
