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In a thermal power station, coal is used for the generation of electricity. How energy changes from one form to another before it is transformed into electrical energy?
  • a)
    Heat energy → Mechanical energy → Electrical energy
  • b)
    Heat energy → Electrical energy → Mechanical energy
  • c)
    Mechanical energy → Heat energy → Electrical energy
  • d)
    Electrical energy → Heat energy → Mechanical energy
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In a thermal power station, coal is used for the generation of electri...
In a thermal power station fuel such as coal, oil or gas is burned in a furnace to produce heat - chemical to heat energy.
  • This heat is used to change water into steam in the boiler
  • The steam drives the turbine - heat to kinetic energy (Mechanical energy)
    • This drives the generator to produce electricity - kinetic to electrical energy
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Most Upvoted Answer
In a thermal power station, coal is used for the generation of electri...
Energy Transformation in a Thermal Power Station
Energy undergoes several transformations before it is converted into electrical energy in a thermal power station. The process involves the conversion of coal's chemical energy into heat energy, mechanical energy, and finally electrical energy.

Heat energy → Mechanical energy → Electrical energy
- Heat energy: Coal is burned in the boiler to produce heat energy through combustion. This heat is used to convert water into steam.
- Mechanical energy: The high-pressure steam produced from the heat energy rotates a turbine. As the steam flows through the turbine blades, it causes the turbine to rotate, converting the heat energy into mechanical energy.
- Electrical energy: The rotating turbine is connected to a generator, which converts the mechanical energy into electrical energy through the principles of electromagnetic induction. The generator produces electricity that can be transmitted and distributed for use.
By following this sequence of energy transformations, the thermal power station effectively harnesses the energy stored in coal to generate electricity for various applications.
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