What is the formula for calculating the total power in a resistive AC circuit?
Practice Questions
1 question
Q1
What is the formula for calculating the total power in a resistive AC circuit?
P = V^2 / R
P = I^2 * R
P = V * I * cos(φ)
P = R * I^2
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 the voltage and current.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the formula for calculating 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 the voltage and current.
Steps: 5
Step 1: Understand that in a resistive AC circuit, power is the energy used over time.
Step 2: Identify the variables in the formula: V is the voltage, I is the current, and φ (phi) is the phase angle.
Step 3: Recognize that in a purely resistive circuit, the phase angle φ is 0 degrees, which means cos(φ) equals 1.
Step 4: Write the simplified formula for total power in a resistive AC circuit: P = V * I.
Step 5: To find the total power, multiply the voltage (V) by the current (I).
