Tag: energy conservation and sources

Questions Related to energy conservation and sources

Identify the energy saving light bulb.

evs sources of water conservation of natural and energy resources energy conservation and sources importance of the conservation of natural resources

  1. Incandescent bulb

  2. Compact fluorescent light bulb

  3. Light emitting diode bulb

  4. Both B and C

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Correct Option: D
Explanation:

CFL (Compact fluorescent light bulbs) and LED (Light emitting diode bulb) are used in place of incandescent bulb because they use about 1/7$^{th}$ of the power used by the incandescent bulb. Hence, they are highly efficient in saving electricity.

Thus, the correct answer is option D.

Solar energy is the .......... source of energy.

evs sources of water conservation of natural and energy resources energy conservation and sources importance of the conservation of natural resources

  1. Conventional

  2. Non conventional

  3. Man made

  4. None of the above

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Correct Option: B
Explanation:

Energy generated by using wind, tides, solar, geothermal heat, and biomass is known as non-conventional energy. Solar energy is an inexhaustible non-conventional resource. There are three methods of harnessing solar energy- direct heating (e.g., solar cookers), thermoelectric conversion or solar thermal power plants, for example, steam generation and photovoltaic conversion.

Thus, the correct answer is option B.

Switch on the power when TV is not in use leads to the energy loss of

evs sources of water conservation of natural and energy resources energy conservation and sources importance of the conservation of natural resources

  1. 5 watts

  2. 10 watts

  3. 1 watts

  4. 50 watts

Show answer
Correct Option: B
Explanation:

The energy management is very important for the conservation of energy. It involves monitoring the consumption of energy, finding ways to save (control) energy and taking initiatives to conserve energy by replacing the inefficient equipments and controlling routine waste. The power should not be switched on when TV and any other audio or video device is not in use for a long time. It is because even in the switch off condition energy is consumed by the electric appliances and this is called standby power. 10 watts of energy is consumed by the TV even if, the power is on but TV is not in use. So, the correct option is B.