What is the power used by a circuit that is operating at 480 volts and pulling 45 amps?

To calculate the power used by the circuit, we can apply the formula:

\[
P = V \times I
\]

where:
- \( P \) is the power in watts (W),
- \( V \) is the voltage in volts (V),
- \( I \) is the current in amperes (A).

Given:
- Voltage \( V = 480 \, V \),
- Current \( I = 45 \, A \).

Now, substituting the values:

\[
P = 480 \, V \times 45 \, A = 21,600 \, W
\]

The power used by the circuit is 21,600 watts or 21.6 kW.

Would you like more details or have any other questions?

Here are five related questions:
1. How does power change if the voltage increases but the current remains the same?
2. What happens to power consumption if the current decreases in a constant voltage circuit?
3. How would the power formula change for an AC circuit with a power factor?
4. What is the relationship between power, resistance, and current in a circuit?
5. How can efficiency losses affect the total power used in real-world circuits?

**Tip:** Always ensure the voltage and current units are consistent (volts and amperes) when calculating power using the basic formula.

Learn how to calculate the power used by a circuit operating at 480 volts and pulling 45 amps using the formula P = V × I. This problem covers electric power calculations and is suitable for students in Grades 9-12.

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