(Physics)
What is gravitational field intensity? If mass of Jupiter is kg and mass of sun is kg and distance between them is km, find the gravitational force between them. [1+1+2.5]
What is weightlessness? What is Gravitational constant? Prove that the acceleration due to gravity of any objects on the surface of the earth is .
State Pascal's law. Prove that upthrust = [1.5+2]
On what factors does pressure of liquid depend? Prove that
Why the sun is called main source of energy? Why is the development and use of alternative energy sources necessary in today's world?
What do you mean by specific heat capacity? Why in winter water pipe burst?
One kg sand of the specific heat capacity energy 880 J/kgoc at 40oc is cooled up to the temperature 10o c. How much heat energy is released?
Write Faraday's laws of electromagnetic induction. What is fuse? Why it is connected always in a live line?
What do you mean by transformer? If a transformer with 1000 primary winding steps down 220 volt to 30 volt how secondary winding may are here in it? [1+2.5]
(Chemistry )
How was the modern periodic table developed? Write in brief. What are lanthanides and actinides?
Define chemical reaction. What are the three main factors that bring about a chemical change? Describe.
Define solubility of substance. What is the relation between temperature and solubility? How much solute is required to make a saturated solution of sodium thiosulphate with 10 gm of water if solubility of sodium thiosulphate is 70 at 20oc
What is ceramics? How is pollution caused by insecticides and chemical fertilizers? How is ordinary glass made?
(Biology)
Why virus is called obligatory parasite? Write the figure of bacterio-phase of virus.
Classify the following animal with one important character.
a. Prawn
b. starfish
c. bat
Why meiosis cell division is called reduction division? Write down its two importance.
What is sexual reproduction? What is external fertilization? Write about any one asexual reproduction.
What is evolution? How is theory of evolution proved by the study of vestigial organ?
What is adaptation? Write any three adaptation characteristics of aquatic animals.
[1+2]
(Astronomy & Geology)
In which period did the dinosaurs evolve? Why is coal important to us? Describe the importance of fossil fuel?
What are comets? Why is their tail seen coming near the sun?
Write down causes green house effect.
