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