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Use of …………………… mirror would be best for...

Use of …………………… mirror would be best for in solar cooker.

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concave
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What kind of mirror-concave, convex or plain - would be best suited for use in a solar cooker ? Why ?

A small candle, 2.5 cm in size is placed at 27 cm in front of a concave mirror of radius of curvature 36 cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Describe the nature and size of the image. If the candle is moved closer to the mirror, how would the screen have to be moved?

…………………… is the best process to capture solar energy and convert it into biomass.

To study the structure and working of a solar cooker and/or water heater. Activity is done for understanding how the solar equipments are insulated and how does maximum heat absorption is ensured. Property : A black surface absorbs more heat. Structure : rarr It consists of an insulated metal box or a wooden box which is painted black from inside. rarr The box has a thick glass sheet as a cover over the box. rarr A plane or concave mirror is attached to the box that acts as a reflector. rarr Mirror focuses the rays of the sun into the box. What temperature is achieved in solar cooker/solar water heater ?

To study the structure and working of a solar cooker and/or water heater. Activity is done for understanding how the solar equipments are insulated and how does maximum heat absorption is ensured. Property : A black surface absorbs more heat. Structure : rarr It consists of an insulated metal box or a wooden box which is painted black from inside. rarr The box has a thick glass sheet as a cover over the box. rarr A plane or concave mirror is attached to the box that acts as a reflector. rarr Mirror focuses the rays of the sun into the box. State energy conversion in solar cooker/solar water heater.

Name the type of mirror used in side / rear view mirror of a vehicle. Support your answer with reason.

Name the type of mirror used in side/rear view mirror of a vehicle. Support your answer with reason.

Name the devices to harness solar energy.

KUMAR PRAKASHAN-SOURCES OF ENERGY-OBJECTIVE QUESTIONS AND ANSWERS
  1. …………………… plant is an efficient method of bio waste disposal.

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  2. …………………… is the best process to capture solar energy and convert it in...

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  3. Use of …………………… mirror would be best for in solar cooker.

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  4. …………………… is abundant in nature but availability of its special grade i...

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  5. The hydrogen bomb is based on …………………… reaction.

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  6. India is ranked …………………… in harnessing wind energy for the production ...

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  7. The total …………………… of the universe remains constant because it can nei...

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  8. The potential energy of flowing water gets transformed into kinetic en...

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  9. In solar cookers, a plain mirror is used to converge the sunlight.

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  10. Fossil fuels are the major fuels used for generating electricity.

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  11. Submerged vegetation rots under anaerobic condition producing large am...

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  12. Biogas is derived totally from animal biomass.

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  13. The level of water in the sea rises and falls due to the gravitational...

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  14. Nuclear energy is the best alternative of fossil fuel because of its e...

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  15. The nuclear bomb is embedded in a deuterium and lithium containing sub...

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  16. The assembly of the solar cell may be pollution free but the actual op...

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  17. The energy sources that can be regenerated are called renewable energy...

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  18. Nuclear fusion reactions are the source of energy in the sun and other...

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  19. Graph/diagram based question : Which of the following graph is correct...

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  20. Match the following :

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