Question

Under clear (cloudless) sky conditions, the daily average of solar energy that is received in India varies from
1. 40 to 70 kwh/m²
2. 5000 kWh/m²
3. 8 to 10 kWh/m²
4. 4 to 7 kWh/m² 
5.

Answer 1

Correct Answer - Option 4 : 4 to 7 kWh/m² 

The correct answer is 4 to 7 kWh/m2.

• India is lucky to receive solar energy for the greater part of the year.
• It is estimated that during a year India receives energy equivalent to more than 5,000 trillion kWh.
• Under clear (cloudless) sky conditions, the daily average varies from 4 to 7 kWh/m².
• The solar energy reaching unit area at the outer edge of the earth’s atmosphere exposed perpendicularly to the rays of the Sun at the average distance between the Sun and Earth is known as the solar constant.
• It is estimated to be approximately 1.4 kJ per second per square meter or 1.4 kW/m².

 

• Solar Energy:
  • Most commonly known source of alternative energy.
  • Solar energy is obtained from the Sun.
  • Solar energy is a non-conventional and renewable source of energy.
  • As they are prone to deterioration over time and aren’t completely weather-safe are some drawbacks to Solar Energy.
• A photovoltaic cell or solar cell is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a chemical and physical phenomenon.
• In this Solar cell, Silicon crystals are laminated into p-type and n-type layers, stacked on top of each other. Light or Solar Rays striking the crystals induces the “Photovoltaic effect,” which generates current or electricity.
• The electricity produced is called direct current (DC) and can be used immediately or stored in a battery.