11)What are the disadvantage of solar energy
All of the above are disadvantages.
All the points given are the disadvantage age of using solar energy.
12)The temperature inside the solar cooker ranges from
100-140°C
The box type solar cooker have a range 100-140°C.
13)The use of reflector in the solar cooker is to
increase efficiency
Reflectors (mirror) are used to focus the sun rays along with heat radiation inside the box to achieve high temperature.
14)Solar cells are made of
silicon
special grade silicon is used for making solar cells.
15)The material used for interconnection the solar cells in the solar panel is
silver
Silver is the best conductor of electricity.
16)A solar panel is made by combining in an arrangement
solar cells
A large number of solar cells connected together in a particular arrangement to deliver useful electrical power is called solar cell panel.
17)Tidal energy is a farm of energy obtained from the
ocean in the form of tidal waves
The energy produced by the surge of ocean water during high and low tides due to difference in sea level is called tidal energy.
18)Tidal energy is harnessed by constructing a dam across
narrow opening to the sea
Tidal energy is harnessed by constructing a dam near the shores across narrow opening it.
19)Wave energy is caused due to
both (a) and (b)
The waves are generated by a strong wind due to solar energy across the sea.
20)The working fluid in ocean thermal power plant is
Volatile liquid like ammonia