Important Units Of Measurements | Physics General Knowledge questions and answers

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List Important Units Of Measurements in Physics

    1. 1 horse power is 745.7 watts
    2. 1 horse power = work equal to lifting 550 lbs of weight to one foot for one second
    3. 1 calorie is equal to 4.2 Joules
    4. 1 barrel is equal to 159 liters
    5. 6 feet = 1 fathom
    6. 1 kwh = 3.6 x 10 power 6 joules
    7. A 100 watt bulb lights for 1 hour uses 100 watt hour of electricity
    8. -273 degree centigrade is called absolute zero temperature.
    9. Standard pressure is 760 mm or 14.7 lb/in2
    10. Gross is equal to 12 dozens • Mach 2 = 500 miles per hour
    11. 1 nautical mile = 1825 meters
    12. Unit of pressure is Pascal
    13. Force is measured in Newton (SI), Dyne (CGS)
    14. At -40 deg F Fahrenheit scale is equal to centigrade scale
    15. Hertz and Angstrom are units of frequency
    16. Units of work and energy are Joule and Erg (CGS)
    17. Diopter is unit of power of lens
    18. Unit is density is kg/m3
    19. Unit of power is watt, BTU (Board of Trade Unit)
    20. Unit of electric charge is Coulomb
    21. Unit of voltage is volt
    22. Unit of electric resistance is ohm
    23. Unit of capacitance is Farad
    24. Unit of magnetic flux is Weber, Tesla
    25. Unit of radio activity is Becquerel
    26. Unit of luminous intensity is candle, lux
    27. Unit of crude oil is Barrel
    28. Unit of volume of water is cusec, cubic/sec
    29. Unit of admittance is Mho
    30. Unit of intensity or loudness of sound is bel
    31. Unit of viscosity is Poise
    32. Unit of flight speed is Mach I
    33. Unit of atmospheric pressure is milli bar
    34. Unit of wave length of light is Angstrom
    35. Unit of energy is Electron volt
    36. Unit of brightness is Lambert
    37. Unit of luminous flux is Lumen
    38. Intensity of illumination or unit of luminosity is Lux, Candela and Candle power
    39. Unit of magnetic pole strength is Weber
    40. Unit of RAD (Radiation Absorbed Dose) is Gray
    41. Unit of Electric Current is Ampere
    42. Unit of inductance is Henry
    43. Unit of conductance is siemens.
    44. Unit of heat is Joule, Calorie, BTU (British Thermal Unit)
    45. Radio activity is measured in currie
    46. Rutherford : strength of radioactivity
    47. Torr: pressure
    48. Fermi : length [A unit of length equal to one femtometer (10-15 meter)]
    49. Sved berg unit:sedimentation rate
    50. Dioptre: power of lense
    51. Mho : conductivity
    52. Henry: inductance
    53. Maxwell: magnetic flux
    54. Becquerel: radioactivity
    55. Kilo watt hour: power
    56. Coulomb: unit of electrical charge
    57. Weber: unit of magnetic flux
    58. Tesla: unit of magnetic flux density
    59. Siemen: unit of conductance
    60. Rutherford: unit of rate of decay of radioactive material
    61. Faraday: unit of electric charge
    62. Angstrom: unit of length, used especially to specify radiation wavelengths
    63. Parsec: unit of astronomical length
    64. Degree: unit of measurement of an angle
    65. Steradian: Unit of solid angle measurement
    66. Dyne is a unit of Force.
    67. SI unit of pressure is Pascal.
    68. Curie is a unit of : radioactivity
    69. Pascal Sound Pressure
    70. Torr Pressure
    71. Curie Intensity of radioactivity
    72. Angstrom Unit of length
    73. Light year The distance light travels in a year
    74. Dioptre Lens refractive power
    75. Horse power Unit of Power
    76. Radian Unit of angular measure
    77. Candela Unit of luminous intensity
    78. Mole unit of amount of substance
    79. What is measured in units called phon- Sound 192
    80. What is measured in grains – four grains to a carat- Pearls
    81. Unit of electromotive force in Volt.
    82. What is the SI unit of illumination -Lux
    83. Gross is equal to 12 dozen.
    84. Ozone is measured in percent age.
    85. What is measured on the Gay-Lussac scale: Alcohol strength
    86. Chronometer is used to measure… time
    87. Anemometer is used to measure… Wind Speed
    88. The clusec is the unit measuring the power of what Vacuum pumps
    89. One million cycles per second is called Megahertz.
    90. 200 grams are equal to one carat.
    91. Voltammeter is an electrolytic cell for conducting electrolytic dissociation of electrolyte.
    92. 8 furlongs make one mile.
    93. A billion contain 1000 million. It has 9 zeroes. Similarly a trillion has 12 zeroes,a quadrillion 15 zeroes,a quintillion 18 zeroes and a decillion 33 zeroes.
    94. One inch is equal to 2.5400 cms and one mile is equal to 1.6093 kms.
    95. One micron is equal to One-thousandth of a millimeter.
    96. 47105 acres is equal to what SI unit-Hectare
    97. What word describes one tenth of a nautical mile-Cable
    98. What is measured on the Torro scale –Tornados
    99. unit of sound named after- Alexander Graham Bell – Decibel
    100. The density Smoke is measured on the Rngelmann scale-
    101. Unit of electromotive force in Volt.
    102. Power is measured in Watts (w).
    103. Resistance was discovered by Girge Ohm in 1826, and is measured in ohms.
    104. Electricity does not flow through a circuit by itself. It needs a ‘push’, or energy, to keep it moving. We call this energy the voltage of the circuit. Voltage is measured in volts (v).
    105. The German scientist George Ohm (1787-1854) is best remembered for working out ohm’s law. He discovered that they voltage across a conductor such as a trip of metal or a wire – and the current following through it always vary in the same proportion. So if you double the voltage, you double the current. This is incredibly useful; because it lets you predict the current you will get for a particular voltage.
    106. The thickness of silk is measured in what- Denier
    107. Ohm’s law does not apply to semiconductors and conductors when there is change in temperature.
    108. In our houses we get 220 V a.c. The value of 220 V represents the effective voltage.
    109. If the same note is played on a flute and a sitar, one can still distirguish b/w them because they differ in quality.
    110. A negatively charged glass rod has always less protons than electrons.
    111. The wavelength of the X-rays is of the order of 0.1 nanometer.
    112. Red, green and blue are known as primary colours. These are colours which cannot be produced by mixing with other colours.
    113. Scattering of light ___ the duration of the day (make)
    114. Oil rises in a wick of oil lamp on account of a property of matter called Capillary Action • a primary cell can ___ be charged again (not)
    115. When a person can see nearer objects but not the distant ones he is said to be suffering from : nearsightedness (myopia)
    116. ATP is a molecule containing high energy bonds.
    117. An example of inorganic compound is carbon monoxide.
    118. The time period of a pendulum on moon increases.
    119. Clinical thermometer usually measures in Fahrenheit.
    120. Tube light emits radiation even after it is disconnected. It is due to Fluorescence.
    121. Shortsightedness can be corrected with the use of Concave.
    122. Rectifier converts AC into DC
    123. Atomic weight of chemical compounds is determined by Mass spectroscopy.
    124. Atomic pile is a place where nuclear fission is made.
    125. Drinker’s apparatus is for measuring the amount of Alcohol in the blood.
    126. Dewar’s flask is called as thermos.
    127. The conversion of gases into liquid under high pressure and low temperature is called regulation.
    128. If a green leaf is seen in a red light its color will be black.
    129. Emerge of VIBGYOR from one side of the prism is due to refraction and dispersion of light.
    130. Oxidation is the process in which electron is lost.
    131. Half-time is a time of radioactive substance taken by that substance to decompose radioactivity to half of its weight.
    132. Light energy is stored in the form of chemical energy due to the activity of Chloroplast.
    133. Sunlight is composed of seven colours
    134. Oil rises in a wick of oil lamp on account of a property of matter called Capillary Action
    135. What is a Fata Morgana- Type of Mirage
    136. Freon-trademark for any of a number of chemical compounds containing fluorine, and often chlorine or bromine. Use: as solvents, as aerosol propellants, in refrigeration. It is commonly used in refrigerator.


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