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Q1. For a short sighted person
Correct answer : 3
Q2. For a given prism, the angle of deviation of each colour is independent of
Correct answer : 2
Q3. For a given amount of energy released, which fuel releases the most quantity of carbon dioxide?
Correct answer : 1
Q4. Focal lengths of objective and eye piece of a telescope are 200 cm and 4 cm respectively. What is the length of telescope for normal adjustment?
Correct answer : 2
Q5. Focal length of a curved mirror depends on
Correct answer : 4
Q6. Fleming’s right hand rule is also known as .............
Correct answer : 3
Q7. Fleming’s left hand rule is used to find the direction of ...........
Correct answer : 4
Q8. Find the correct statement with reference to solar cell.
Correct answer : 4
Q9. Falling of a person, getting down from a moving bus can be explained on the basis of Newton’s
Correct answer : 1
Q10. Evaporation occurs at
Correct answer : 1
Q11. Energy released per fission is ...........
Correct answer : C
Q12. Energy can neither be created nor be destroyed, is a statement of the
Correct answer : A
Q13. Energy available from the ocean is
Correct answer : 4
Q14. EM satisfies all the phenomena of ...........
Correct answer : 4
Q15. Electrons that move very easily from one atom to another are called .......... electrons.
Correct answer : 3
Q16. Electromagnetic waves are
Correct answer : 3
Q17. Electro magnets are based on the principle of
Correct answer : 4
Q18. Electric power is defined as
Correct answer : 1
Q19. Electric current will stop flowing when the potential difference is
Correct answer : 3
Q20. Electric current is defined as the rate of flow of ............
Correct answer : 3
Q21. Einstein’s mass-energy relation is ...........
Correct answer : 3
Q22. Electric current always flows
Correct answer : 1
Q23. During the phenomena of absorption, light behaves as
Correct answer : 1
Q24. During sunset or sunrise. the sky appears
Correct answer : 3
Q25. During nuclear fission, the chain reaction can be controlled by absorbing excess of ..........
Correct answer : 2
Q26. During lateral inversion the image of an object turns by .............. about vertical axis.
Correct answer : 2
Q27. During interference, light behaves as what?
Correct answer : 2
Q28. During electric power transmission electric energy is dissipated in the form of ...........
Correct answer : 3
Q29. During dispersion, the emergent ray is bent
Correct answer : 3
Q30. Due to which the photographic plate lying near uranium compound is affected?
Correct answer : 3
Q31. Due to very weak inter-atomic force gas molecules.
Correct answer : 4
Q32. Drinking water is purified by treating it with
Correct answer : 2
Q33. Due to the change in relative position of the molecules the body suffers
Correct answer : 2
Q34. Domestic appliances are designed to operate at ...........
Correct answer : 1
Q35. Disadvantage of geothermal energy is
Correct answer : 1
Q36. Dirty clothes having grease and oil stains cannot be washed with water. Why?
Correct answer : 3
Q37. Diffused reflection occurs at a ........ surface.
Correct answer : 2
Q38. Destructive distillation of coal leads to the formation of
Correct answer : 4
Q39. Density of an object is 725 kgm–3, what happens when it is immersed in water?
Correct answer : 1
Q40. Density of aluminium is 2700 kg/m3, what is its relative density?
Correct answer : 1
Q41. Danger signals should be in ......... colour.
Correct answer : 2
Q42. Cyan, yellow and magenta form
Correct answer : 2
Q43. Current produced in a conductor when it moves into a magnetic field is known as
Correct answer : 4
Q44. Current of 7 A flowing through a coil of resistance 60W. The amount of heat produced by this coil is 60 and is ...........kJ.
Correct answer : 4
Q45. CSP stands for
Correct answer : 3
Q46. Current carrying conductor when placed in a magnetic fiold experience a force due to what?
Correct answer : 1
Q47. Continuation of impression of image on the retina is for about ........... of a second even after the object is removed.
Correct answer : 3
Q48. Concave lens is used to correct
Correct answer : 2
Q49. Commercial unit of electrical energy is
Correct answer : 2
Q50. Circular part in the centre of retina of human eye is called