General Interesting Science Questions
-General Interesting Science
Questions-
Ans.The current pass through tungsten, it become white hot and begins to emit light.
Q.1. Why does a body immersed in water weight less than it weighs in air ?
Ans. The upward pressure of water called thrust relieves the force of gravity to some extent and thus results in reduction of weight in water as compared to air.
Q.2. What is the cause of night blindness ?
Ans .It is caused due to deficiency of Vitamin ‘A’
Q.3. What is the function of fuse wire in electric circuit ?
Ans .A fuse wire has low melting point ,when the current is strong the fuse wire get heated up and melted down and it save the circuit from getting over heated .
Q.4. Do you why the perimeter of rectangle is 2(l+b).From where 2(l+b) come?
Ans.
As you can see in image perimeter stands for sum of all sides
so the four sides are:
= l+l+b+b
= 2l+2b [Taking 2 common]
= 2(l+b)
ok.
ok.
Q.5.Why are two eyes more valuable than one ?
Ans .We can view the object from two points at once giving us an idea of solidity also and not only of flatness.
Q.6.Why does a piece of iron get rusted when it left in open ?
Ans. When the piece of iron come in contact of oxygen or moisture, it form iron oxide, a compound of iron and oxygen.
Q.7.Why can petrol fire not be put out with water?
Ans.The temperature of the fire is very high so , when we throw water on the fire the water got evaporated.
Q.8.Ice packed in a saw dust does not melt quickly,why?
Ans.Because saw dust is bad conductor of heat and protect ice from melting quickly.
Q.9. Why do we see rainbow after rain?
Ans. After rain the water droplets or water particle scatter in sky and work like prism and as we all know that prism disperse light in 7 colour .
Ans.The current pass through tungsten, it become white hot and begins to emit light.
Comments
Post a Comment