Enfant India International School. First Unit test .. Class-10th. Subject-Physics. M.marks-40

Question 1 Explain why Gravitational force is non contact?(3)

Question 2 Is Frictional Force a Contact force?Explain why?(2)

Question 3 Prove Work Energy Theorem?(3)

Question 4 Prove that Power=Force×velocity?(2)

Question 5 Prove that for a freely falling body mechanical energy remains constant?(5)

Question 6 Define Refraction and Explain why does it happen?(3)

Question 7 Explain why refractive index is unitless?(2)

Question 8 Explain the energy transformation in 1.Transistor 2.Torch 3.Electric iron (6)

Question 9 Explain Soddy Fazan's group displacement law?(4)

Question 10 What do you mean by half life time?(3)

Question 11 Difference between Nueclear Fission and Fusion?(3)

Question 12 How much time Radium will take to remain 25% of original mass if it's half life is 10 years?(4)