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व्यावहारिक

Electric Power Calculator

Electric Power Calculator

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We're working on a comprehensive educational guide for the Electric Power Calculator in your language. The content below is shown in English.

What is Electric Power Calculator?

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Electric power is the rate at which electrical energy is transferred or consumed. P = V × I (voltage × current), and by Ohm's law can also be expressed as P = I²R or P = V²/R. Measured in watts (W) or kilowatts (kW).

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How to Electric Power Calculator

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  1. 1P = V × I (Power = Voltage × Current)
  2. 2P = I² × R (using resistance and current)
  3. 3P = V² / R (using resistance and voltage)
  4. 4Energy consumed: kWh = kW × hours; cost = kWh × tariff rate

Worked Examples

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Example 1
Given:230V supply · 5A current
परिणाम:Power = 1,150W (1.15 kW)

230 × 5 = 1,150

Example 2
Given:2kW heater on 4 hours · 28p/kWh tariff
परिणाम:Cost = £0.56 (56p)

2 × 4 × 0.28 = £2.24/day if 4hr/day

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Did you know?

The entire electrical output of a nuclear power plant (about 1 GW = 1,000,000,000 W) could power approximately 700,000 UK homes. A single human at peak physical output generates about 400W — the same as four bright light bulbs.

Mathematically verified
Reviewed October 2026
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