Скачать или смотреть MADHYAMIK PHYSICAL SCIENCE , CURRENT ELECTRICITY, ELECTRIC POWER AND ELECTRIC ENERGY

⚡ Electric Power and Energy: A Complete Overview
🔌 What Is Electric Power?
Electric power is the rate at which electrical energy is transferred or converted in a circuit. It tells us how quickly energy is being used or produced.

Formula: P =VI
where P is power (in watts), V is voltage (in volts), and I is current (in amperes).

Unit: Watt (W) One watt equals one joule of energy per second.

Types of Electric Power:

DC Power: Constant voltage and current (e.g., batteries).

AC Power: Alternating voltage and current (e.g., household electricity).

Real Power: Actual usable power in watts.

Reactive Power: Power stored and released by inductors/capacitors.

Apparent Power: Combination of real and reactive power.

🔋 What Is Electrical Energy?
Electrical energy is the total amount of work done by electric power over time. It represents the capacity to do work and is consumed by devices to perform tasks.
E is energy (in joules or kilowatt-hours), P is power, and t is time.

Units:

Joule (J): SI unit of energy.

Kilowatt-hour (kWh): Common unit for electricity billing.

Electron-volt (eV): Used in atomic-scale energy calculations.


🔧 Real-World Applications
Home Appliances: Rated in watts to indicate power consumption.

Industry: Uses megawatts to run heavy machinery.
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Renewable Energy: Solar panels and wind turbines generate electric power from natural sources.

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