Exam Paper Code-01

ONLINE EXAM – E11

Q1. What is light? A. A form of energy B. A material substance C. A wave only D. A particle only ANSWER:A Q2. Which device is used to see distant objects clearly? A. Microscope B. Telescope C. Periscope D. Kaleidoscope ANSWER:B Q3. The bouncing back of light from a surface is called: A. Refraction B. Dispersion C. Reflection D. Scattering ANSWER:C Q4. Which surface gives regular reflection? A. Rough wall B. Paper C. Plane mirror D. Mud surface ANSWER:C Q5. Which mirror always forms a virtual image? A. Concave mirror B. Convex mirror C. Plane mirror D. Spherical mirror ANSWER:C Q6. A concave mirror is also called: A. Converging mirror B. Diverging mirror C. Plane mirror D. Glass mirror ANSWER:A Q7. A convex mirror is also called: A. Converging mirror B. Diverging mirror C. Plane mirror D. Reflecting lens ANSWER:B Q8. Which mirror is used as a rear-view mirror in vehicles? A. Plane mirror B. Concave mirror C. Convex mirror D. Cylindrical mirror ANSWER:C Q9. The centre of the reflecting surface of a mirror is called: A. Pole B. Focus C. Centre of curvature D. Radius ANSWER:A Q10. The point where parallel rays meet after reflection is called: A. Pole B. Focus C. Radius D. Centre ANSWER:B Q11. The distance between pole and focus is called: A. Radius of curvature B. Diameter C. Focal length D. Aperture ANSWER:C Q12. Image formed by a plane mirror is always: A. Real and inverted B. Virtual and erect C. Real and erect D. Virtual and inverted ANSWER:B Q13. Which mirror can form a real image? A. Plane mirror B. Convex mirror C. Concave mirror D. Glass sheet ANSWER:C Q14. When an object is placed very close to a concave mirror, the image is: A. Small and real B. Large and virtual C. Small and virtual D. Same size ANSWER:B Q15. The formula used to find image distance in mirrors is called: A. Lens formula B. Mirror formula C. Magnification formula D. Reflection law ANSWER:B Q16. Magnification is the ratio of: A. Image distance to object distance B. Image height to object height C. Focal length to radius D. Pole to focus ANSWER:B Q17. Refraction of light occurs due to change in: A. Speed of light B. Colour of light C. Energy of light D. Direction of light only ANSWER:A Q18. Refraction occurs when light travels from: A. One colour to another B. One medium to another C. One mirror to another D. One source to another ANSWER:B Q19. Which medium has maximum refractive index? A. Air B. Water C. Glass D. Vacuum ANSWER:C Q20. The bending of light at the boundary of two media is called: A. Reflection B. Dispersion C. Refraction D. Scattering ANSWER:C Q21. Refractive index depends on: A. Shape of medium B. Colour of medium C. Nature of medium D. Size of medium ANSWER:C Q22. The unit of refractive index is: A. cm B. m C. No unit D. m/s ANSWER:C Q23. A lens that converges light rays is called: A. Concave lens B. Convex lens C. Plane mirror D. Prism ANSWER:B Q24. A lens that diverges light rays is called: A. Convex lens B. Concave lens C. Cylindrical lens D. Glass slab ANSWER:B Q25. Which lens is used to correct myopia? A. Convex lens B. Concave lens C. Plane lens D. Prism ANSWER:B Q26. Which lens is used to correct hypermetropia? A. Concave lens B. Convex lens C. Cylindrical lens D. Prism ANSWER:B Q27. Myopia is also known as: A. Long sightedness B. Short sightedness C. Night blindness D. Colour blindness ANSWER:B Q28. Hypermetropia is also known as: A. Short sightedness B. Long sightedness C. Night blindness D. Partial blindness ANSWER:B Q29. The formula used for lenses is called: A. Mirror formula B. Lens formula C. Refraction law D. Magnification law ANSWER:B Q30. Power of a lens is measured in: A. Watt B. Dioptre C. Joule D. Metre ANSWER:B Q31. A prism splits white light into different colours due to: A. Reflection B. Refraction C. Dispersion D. Scattering ANSWER:C Q32. The band of seven colours obtained from white light is called: A. Image B. Spectrum C. Shadow D. Reflection ANSWER:B Q33. Which colour deviates most in a prism? A. Red B. Green C. Yellow D. Violet ANSWER:D Q34. Which colour deviates least in a prism? A. Violet B. Indigo C. Blue D. Red ANSWER:D Q35. Scattering of light causes: A. Blue colour of sky B. Reflection of mirrors C. Image formation D. Refraction only ANSWER:A Q36. The colour of the sky appears blue due to: A. Reflection B. Refraction C. Dispersion D. Scattering ANSWER:D Q37. Sun appears red at sunrise and sunset due to: A. Reflection B. Refraction C. Scattering D. Dispersion ANSWER:C Q38. Tyndall effect is the scattering of light by: A. Large particles B. Colloidal particles C. Gases only D. Solids only ANSWER:B Q39. Tyndall effect helps us to see: A. Stars B. Rainbow C. Path of light D. Image in mirror ANSWER:C Q40. Which phenomenon explains visibility of sun rays in a dusty room? A. Reflection B. Refraction C. Tyndall effect D. Dispersion ANSWER:C Q41. Image formed by a convex mirror is always: A. Real and inverted B. Virtual and erect C. Real and erect D. Enlarged ANSWER:B Q42. Image formed by a concave lens is always: A. Real B. Virtual C. Inverted D. Enlarged ANSWER:B Q43. The distance between optical centre and focus of a lens is called: A. Radius B. Diameter C. Focal length D. Aperture ANSWER:C Q44. A real image can be obtained on a: A. Mirror surface B. Screen C. Eye D. Lens surface ANSWER:B Q45. Which mirror is used in shaving mirrors? A. Convex mirror B. Plane mirror C. Concave mirror D. Cylindrical mirror ANSWER:C Q46. Which mirror gives a wider field of view? A. Plane mirror B. Concave mirror C. Convex mirror D. Parabolic mirror ANSWER:C Q47. The refractive index of air is nearly: A. 1 B. 1.5 C. 2 D. 0 ANSWER:A Q48. When light enters glass from air, it bends: A. Away from normal B. Along the normal C. Towards the normal D. Stops ANSWER:C Q49. Which defect of vision occurs due to ageing? A. Myopia B. Hypermetropia C. Presbyopia D. Astigmatism ANSWER:C Q50. Presbyopia is corrected using: A. Only concave lens B. Only convex lens C. Bifocal lens D. Prism ANSWER:C Q51. Which colour of light has maximum wavelength? A. Violet B. Blue C. Green D. Red ANSWER:D Q52. Which colour of light has minimum wavelength? A. Red B. Yellow C. Blue D. Violet ANSWER:D Q53. The speed of light is maximum in: A. Glass B. Water C. Air D. Vacuum ANSWER:D Q54. A rainbow is formed due to: A. Reflection only B. Refraction only C. Dispersion and reflection D. Scattering only ANSWER:C Q55. Which lens is used in magnifying glass? A. Concave lens B. Convex lens C. Plane lens D. Cylindrical lens ANSWER:B Q56. The image distance is positive for: A. Virtual image B. Real image C. Plane mirror D. Convex mirror ANSWER:B Q57. The object distance is always taken as: A. Positive B. Negative C. Zero D. Infinite ANSWER:B Q58. Which phenomenon causes twinkling of stars? A. Reflection B. Refraction C. Dispersion D. Scattering ANSWER:B Q59. A lens made thinner at the centre is called: A. Convex lens B. Concave lens C. Cylindrical lens D. Plane lens ANSWER:B Q60. Light travels in a straight line in: A. Transparent medium B. Homogeneous medium C. Vacuum D. Any medium ANSWER:B SUBMIT EXAM