Physics Crossword

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Across
  1. 6. A device that produces coherent light by stimulated emission of radiation.
  2. 9. Electrical device used to store charge and energy in the electrical field.
  3. 13. The maximum absolute value attained by the disturbance of a wave or by any quantity that varies periodically.
  4. 14. The rate of doing work.
  5. 15. The point of maximum negative displacement on a transverse wave.
  6. 16. The product of force and time for which force acts, also equal to the change in momentum.
  7. 19. The unit of force, equal to the force that will produce an acceleration of 1m/s2 in a body of mass1 kg.
  8. 21. The transfer of heat by the actual transfer of matter.
  9. 23. A unit of heat, 1______ = 4.186 joules.
  10. 25. The redistribution of energy due to superposition of waves from coherent sources, resulting in alternate light and dark bands
  11. 26. The distance traveled by a body per unit of time.
  12. 28. The total amount of energy radiated each second from the surface of a source.
  13. 29. S.I. unit for power; equivalent to joule/sec.
  14. 30. is done when force acting on a body displaces it.
  15. 34. Microwave amplification by stimulated emission of radiation.
  16. 35. An elementary particle having same mass as that of an electron but equal and positive charge.
  17. 39. Sound waves of frequency less than 20 Hz, below the range of human hearing.
  18. 40. Unit of sound level, if P1 & P2 are two amounts of power, the first is said to be n _______s greater, where n = 10 log10 (P1/P2)
  19. 42. The force per unit area.
  20. 45. A device used to accelerate the charged particles.
  21. 46. Fixed amounts; usually referring to fixed amounts of energy absorbed or emitted by matter.
  22. 47. The point to which rays that are initially parallel to the axis of a lens or mirror are converged or from which they appear to diverge.
Down
  1. 1. The property of a body to resist a change in its state of rest or of uniform motion.
  2. 2. _____ energy:The energy possessed by a body due to its motion, it is equal to ½ mv2, where m is the mass and v is the speed of the body
  3. 3. Unit of potential difference, equivalent to joule/coulomb.
  4. 4. A unit of pressure, equal to the pressure resulting from a force of 1 Newton acting uniformly over an area of 1m2.
  5. 5. A unit of pressure, equal to 105 Pascals.
  6. 7. The gravitational attraction at the surface of a planet or other celestial body.
  7. 8. The bending of light from its straight line path when it travels from one medium to another.
  8. 10. An object which after being given an initial velocity is allowed to fall under the effect of gravity alone.
  9. 11. The ratio of charge stored per increase in potential difference.
  10. 12. The mass of a substance per unit volume.
  11. 17. A collective name for protons and neutrons.
  12. 18. The unit of work and energy, 1J = 1N-m.
  13. 20. The electric charge required to liberate gram equivalent of a substance. 1 ______ = 96485 coulomb/mole.
  14. 22. The bouncing back of a wave from a boundary.
  15. 24. Materials like wood that are poor conductors of heat or electricity.
  16. 27. The transfer of heat from a region of higher temperature to a region of lower temperature by increased kinetic energy moving from molecule to molecule.
  17. 31. The unit of frequency, also known as cycles per second.
  18. 32. The actual path length covered by a body.
  19. 33. atoms of the same element with same atomic no (no of protons) but different mass no (no of neutrons).
  20. 35. A highly ionized gas composed entirely of equal number of positive ions and electrons.
  21. 36. Matter that has the ability to flow.
  22. 37. S.I. Unit of electric current, one ampere is the flow of one coulomb of charge per second.
  23. 38. The number of oscillations completed in 1 second by an oscillating body.
  24. 41. The central, positively charged, dense portion of an atom.
  25. 43. ______ State: The lowest energy state of an atom.
  26. 44. The S.I.unit of capacitance, defined as the capacitance of a capacitor that, if charged to 1 C, has a potential difference of 1 V.
  27. 48. Unit of resistance; 1 _____ = 1volt/ampere.