Question

Answer question numbers (a) - (d) on the basis of your understanding of the following paragraph and the related studied concepts.
Renewable energy sources such as wind energy are vital for the Indian economy, not only from the point of view of supply, but also from the perspective of environmental and social benefits. India is the world’s fifth largest wind-power producer and the largest windmill facilities in India are installed in Tamil Nadu. Muppandal is a small village of Tamil Nadu and one of the most important sites of wind-farm in the state. It uses wind from the Arabian Sea to produce renewable energy. The suitability of Muppandal as a site for wind farms stems from its geographical location as it has access to the seasonal monsoon winds.
The electrical generators used on wind turbines in sites like Muppandal, produce an output AC of 240 V and a frequency of 50 Hz even when the wind speed is fluctuating. A transformer may be required to increase or decrease the vo

Answer 1

Q. The electrical generators used on wind turbines in sites like Muppandal produce an output a.c. of 240 V and a frequency of 50 Hz even when the wind speed is fluctuating. A transformer may be required increase to increase or decrease the voltage so it is compatible with the end usage, distribution, or transmission voltage, depending on the type of interconnection.

(a) State the principle behind the electric generator.

An electric generator works on the principle of electromagnetic induction.

• A generator is a device used to generate electrical energy that can be stored in batteries or directly supplied to homes, shops, offices, etc. The generator works on the principle of electromagnetic induction.

• A coil of a conductor (a tightly wound copper coil around a metal core) is spun at high speed between the poles of a horseshoe magnet. A conductor coil and its core are called an armature.

• The armature is connected to the shaft of a mechanical power source, such as a motor, to rotate. The required mechanical energy can be provided by engines operating on fuels such as diesel, gasoline, or natural gas, or by renewable energy sources such as wind turbines, hydro turbines, or solar turbines.

• A magnetic field passes between the two poles of a magnet. Magnetic fields interact with electrons in conductors to induce currents.

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