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Khub.info Learn TNPSC exam and online pratice
Q1. Non-luminous become visible when they .................. light.
Q2. No matter how far you stand from a mirror. your image appears erect. The mirror is likely to be
Q3. Newton’s law of gravitation states that
Q4. Nichrome is preferred for making heating elements because it has / can
Q5. Natural radioactivity is exhibited by ............
Q6. Natural gas mainly consists of
Q7. Name the type of electricity produced by friction
Q8. Name the two optical phenomena involved in rainbow.
Q9. Name the target elements that are used in the production of x-rays?
Q10. Name the spectrum in which there is no overlapping of colours.
Q11. Name the process of heating coal in the absence of O2
Q12. Name the process of burning fuel?
Q13. Name the process in which liquid is slowly converted into vapour?
Q14. Name the phenomenon in which an induced current is set up in a closed coil whenever magnetic flux linked with it changes.
Q15. Name the phenomena caused by ‘Scattering of light by the colloidal particles’ .
Q16. Name the phenomenon due to which an unmagnetized magnetic substance behaves like a magnet due to the mere presence of another magnet.
Q17. Name the nuclear reaction in which energy is used for peaceful purposes.
Q18. Name the material which allow the light to pass but objects cannot be seen clearly
Q19. Name the magnetic iron ore once used in primitive compass
Q20. Name the gas from which a star is formed
Q21. Name the first Satellite launched by India.
Q22. Name process in which two light nuclear combined together to form heavy nucleus?
Q23. Moving a charge of 2.5 × l0–6C from point A to B. requires 6.3. × l0–4 J of work. what is the potential difference between A and B. [v = w/q]
Q24. Most of the magnetic power appears to be concentrated at certain points. What are they called?
Q25. Most of the refraction of light entering the eye is done by
Q26. Most of the energy we use originally comes from
Q27. Momentum is defined as
Q28. Mirrors used to concentrate sunlight to generate high temperature in, solar furnaces are ............. mirrors
Q29. Microwaves are generated by the electronic device
Q30. Maximum electricity produced in India is from
Q31. Mark the correct arrangement of refractive indices of yellow, red and green.
Q32. Man can hear the sound of frequencies
Q33. Magnetic lines of force travel from ............. outside the magnet.
Q34. Magnetic lines of force originate from the
Q35. Magnetic field in a region is charcterised by
Q36. Magnetic field does not interact with
Q37. LPG mainly consists of
Q38. Loudness is a sensation depending upon
Q39. Living tissues are severely damaged if absorbed by
Q40. Longitudinal waves are produced in
Q41. Liquids vapourising fast is known as
Q42. Liquids exert pressure
Q43. Linear magnification produced by a plane mirror is
Q44. Linear magnification produced by a convex mirror is
Q45. Lightning takes place .......... thunder.
Q46. Light rays coming from a distant object when incident are focussed by a .................. rays, are refracted twice
Q47. Light is used in measuring large distances called
Q48. Light from the sun takes about .......... minutes to reach the earth
Q49. Light enters from air to diamond, which has a refractive index of 2.42. Calculate the speed of light in diamond.
Q50. Light enters from air to diamond having the refractive index 2.2. What is the speed of light in diamond?
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