Energy Resources and Storage

This is an incorrect answer. If the water is stored at a higher height, the potential energy of the water is more and hence, the kinetic energy of the water is also more. Thus, production of electricity is more.

This is the correct answer. Non-conventional sources of energy are those which are new sources of energy, derived to meet energy needs.

The most attractive locations are the Gulf of Cambay and the Gulf of Kutch on the west coast where the maximum tidal range is 11 m and 8 m with average tidal range of 6.77 m and 5.23 m, respectively. The Ganges Delta in the Sundarbans in West Bengal also has good locations for small scale tidal power development.

Biogas typically contains 50-75% methane, with 60-65% being the most common range for well-operating biogas plants. The balance is mostly CO2 (30-40%) with small amounts of other gases. Option B (65%) falls within this typical range and is the correct answer.

Fossil fuels are formed from the remains of ancient plants and animals that originally captured solar energy through photosynthesis millions of years ago. Therefore, the ultimate source of energy stored in fossil fuels is the sun.

Conventional energy sources are those that have been traditionally used for centuries, like wood, agricultural waste, cow dung (biomass). Non-conventional sources are newer or renewable alternatives like wind, solar, tidal, geothermal. Wind is classified as non-conventional renewable energy.

The passage describes electricity that is 'generated by turbines turned by water.' This is the definition of hydroelectric power, where flowing or falling water turns turbines to generate electricity. Thermal, nuclear, and solar power do not use water-driven turbines as their primary generation mechanism.

Rheostat is the variable resistance, i.e. we can vary the value of resistor using rheostat. Rheostat is not energy source. It is used only to increase or decrease the given voltage value in lab experiments.

Natural gas is formed with coal and petroleum from the dead remains of plants or animals.

Solar energy is inexhaustible.

Coal is used in thermal power plants.

Hydrocarbons are a non-renewable resource.

India unveiled a policy to help boost power generation from renewable energy sources on 14^th Jan 2010. The Central Electricity Regulatory Commission (CERC), the central electricity regulator in the country, issued a regulation on the framework of Renewable Energy Certificate (REC) mechanism, intended to facilitate and promote the development of renewable energy sources in the electricity market.

“Peak oil” is the period when the maximum rate of global petroleum extraction is reached, after which the rate of production enters terminal decline. It relates to a long term decline in the available supply of petroleum.

Hydroelectricity is the most widely used form of renewable energy, accounting for 16 percent of global electricity consumption, and 3427 terawatt-hours of electricity production in 2010, which continues the rapid rate of increase experienced between 2003 and 2009.