Power Formula:
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Definition: This calculator converts voltage and current measurements to power in watts using Ohm's Law.
Purpose: It helps electrical engineers, technicians, and DIY enthusiasts determine power consumption or generation in electrical circuits.
The calculator uses the formula:
Where:
Explanation: The voltage is multiplied by the current to calculate the electrical power in watts.
Details: Proper power calculation ensures correct sizing of electrical components, proper circuit design, and energy efficiency.
Tips: Enter the voltage in volts and current in amps. Both values must be > 0 for accurate results.
Q1: Is this formula valid for both AC and DC circuits?
A: This simple formula works for DC circuits. For AC circuits, you need to consider power factor (cos φ).
Q2: What's the difference between volts and watts?
A: Volts measure electrical potential, while watts measure power (rate of energy transfer).
Q3: How can I measure voltage and current?
A: Use a multimeter - set to volts for voltage measurement and amps for current measurement.
Q4: What if I know watts and volts but need current?
A: Rearrange the formula: \( I = \frac{P}{V} \)
Q5: Does this account for efficiency losses?
A: No, this calculates theoretical power. Actual power may differ due to resistance and other factors.