physics gk
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PHYSICS GK MARUTHUPANDI M INDIAN –TN-MDU
16.Ohm‘s 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
Ohm's law
the current through a conductor between two points is directly proportional to the voltage across the two points
I α V V α I
Ohm's law
Born: 16 March 1789, Died : 6 July 1854 (aged 65)
Nationality: German
Field: Physics (Electricity)
17. What is the resistor value in the given circuit?a) 200 Ω b) 1 k Ω c) 2k Ω d) 4k Ω
Resistance value
18. Who discovered the neutron?
a) J.J. Thomsonb) Ernest Rutherford
c) James Chadwickd) Albert Einstein
Neutron
Sir Joseph John Thomson
18 December 1856 – 30 August 1940 English Physicist and Nobel laureate in physics discovery and identification of the electron
Ernest Rutherford
Born: 30 August 1871, Died : 19 October 1937 (aged 66)
Nationality: New Zealander
Field: Physics and Chemistry
James Chadwick
Born: 20 October 1891,
Died : 24 July 1974 (aged 82)
Nationality: British
Field: Physics and Chemistry
Albert Einstein Born: 14 March 1879 , Died:18 April 1955 (aged 76) Residence (Citizenship ): Germany, Italy, Switzerland,
Austria ,Belgium, United States Field: Physics, philosophy
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
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
RADAR
Long-range radar antenna, used to track space objects and ballistic missiles
RADAR Radar of the type used for detection of aircraft. It rotates steadily,
sweeping the airspace with a narrow beam
20. Of the following properties of a wave, the one that is independent of the other is its
a) amplitudeb) velocityc) wavelength
d) frequency
WAVE
a wave is an oscillation accompanied by a transfer of energy that travels through a medium
THANKING YOU
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