The brain development is maximum during
Why does the pressure of air in tyres increase when the vehicle is set in motion 'I
The rotatory motion of the wheels of the vehicle contributes to this increase in pressure.
When the vehicle is in motion, the molecules of the air in the tyres acquire more kinetic energy. This increase in kinetic energy is responsible for the increase in pressure.
Because the tyres suffer a slight contraction when they are in motion.
The temperature increases, air in the tyres expands. . Therefore, there is a slight increase in the pressure of air.
Why is it difficult to walk on ice ?
Because ice is very cold.
Because the force of friction is very less.
Because the force of friction is greater.
Because ice cannot withstand the weight of a person walking on it.
Pregnant woman needs additional food because ,
it is needed to meet the requirements of growing feotus.
of growth of her accessory organs.
both (a) and (b).
None of these.
High protein and carbohydrate diet is recommended during fevers, burns and after surgery because
the7e is more catabolism.
it helps in quick recovery.
both of these.
digestion is improved.
A piece of iron with a cavity in it is heated. What will be the effect on the cavity ?
The cavity will become smaller.
The cavity will become larger.
The size of the cavity will not change.
The cavity will disappear.
A smoked metal ball, when dipped in water appears to shine brightly. Which of the following phenomena of light is responsible for this ?
Total internal reflection.
Rectilinear propagation of light.
A well nourished infant.
doubles its body weight by the end of six months of age.
triples its body weight by the end of one year.
both (o) and (b) -
none of these.
Why human breath is visible in winter but not in summer
Because visibility is better in winter than in'summer.
Because the moisture in the breath condenses, as it comes o of the mouth, during winter.
Because of both of these reasons.
Because of neither of these reasons.
What can be the secret of good health ?
Eating a variety of foods.
Freedom from infection.
Eating lots of tonics.
None of t hese.
1. World Geography -Test-01
2. World Geography -Test-02
3. World Geography -Test-03
4. Geography of India -Test-01
5. Geography of India -Test-02
6. Geography of India -Test-03
7. Geography of India -Test-04
8. Geography of India -Test-05
9. History of India - Test - 01
10. History of India - Test - 02
11. History of India - Test - 03
12. History of India - Test - 04
13. History of India - Test - 05
14. History of India - Test - 06
15. History of India - Test - 07
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