Everyday Science
Solar cells are simple photovoltaic devices that convert solar energy into electricity and are manufactured from the second most abundant element in the earth`s crust. Name It
Bauxite
Silicon
Calcium
Aluminium
Silicon
Solar cells are made up of simple voltaic cell that enables conversion of solar energy into electrical energy directly and is made from the second highest element found in earth`s crust. The material that used in solar cells is Silicon
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Vitamin C is soluble inA. fat
B. water
C. ethers
D. phenols
The density of air in the atmosphere is
A. uniform
B. not uniform
C. zero
D. none of above
In the body, the weight of blood is about
A. 1/12th of body
B. 1/5th of body
C. 1/8th of body
D. 1/4th of body
Which substance is present in fuel?
A. Iron
B. Gold
C. Carbon
D. Copper
The energy stored in coal is
A. kinetic energy
B. potential energy
C. chemical energy
D. nuclear energy
A human breath per minute is
A. 16-30 times
B. 16-20 times
C. 15-20 times
D. 15-18 times
Symbol of Copper is
A. Ca
B. Cl
C. Co
D. Cu
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