PHYSICS-GK

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PHYSICS GK
MARUTHUPANDI M INDIAN TN-MDU
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16.Ohms law is a relationship between

• a) voltage, current, and time
• b) power, current, and resistance
• c) resistance, time, and current
• d) voltage, current, and resistance

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Ohm's law 

• the current through a conductor between two
  points is directly proportional to
  the voltage across the two points
• I a V
• V a I

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Ohm's law 

• Born 16 March 1789, Died 6
  July 1854 (aged 65)
• Nationality German
• Field Physics (Electricity)

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17. What is the resistor value in the given
circuit?

• a) 200 O b) 1 k O c) 2k O d) 4k O

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Resistance value
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18. Who discovered the neutron?

• a) J.J. Thomson
• b) Ernest Rutherford
• c) James Chadwick
• d) Albert Einstein

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Neutron
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Sir Joseph John Thomson

• 18 December 1856 30 August 1940
• English Physicist and Nobel laureate in physics
• discovery and identification of the electron

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Ernest Rutherford

• Born 30 August 1871, Died 19
  October 1937 (aged 66)
• Nationality New Zealander
• Field Physics and Chemistry

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James Chadwick

• Born 20 October 1891,
• Died 24 July 1974 (aged 82)
• Nationality British
• Field Physics and Chemistry

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Albert Einstein

• Born 14 March 1879 ,
• Died18 April 1955 (aged 76)
• Residence (Citizenship ) Germany, Italy,
  Switzerland, Austria ,Belgium, United States
• Field Physics, philosophy

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19. RADAR is used for

• a) locating submerged submarines
• b) receiving a signals in a radio receiver
• c) locating geostationary satellites
• d) detecting and locating the position of
• objects such as aeroplanes

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RADAR

• Acronym for RAdio Detection And Ranging
• Radar is an object-detection system that
  uses radio waves to determine the range, angle,
  or velocity of objects
• It can be used to detect aircraft,
  ships, spacecraft, guided missiles, motor
  vehicles, weather formations

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RADAR

• Long-range radar antenna, used to track space
  objects and ballistic missiles

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RADAR

• Radar of the type used for detection of aircraft.
  It rotates steadily, sweeping the airspace with a
  narrow beam

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20. Of the following properties of a wave, the
one that is independent of the other is its

• a) amplitude
• b) velocity
• c) wavelength
• d) frequency

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WAVE

• a wave is an oscillation accompanied by a
  transfer of energy that travels through a medium

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THANKING YOU