General knowledge About Physics 2019
• Degree:
unit of measurement of an angle
• Steradian:
Unit of solid angle measurement
• Dyne is
a unit of Force.
• SI unit
of pressure is Pascal.
• Curie is
a unit of : radioactivity
• Pascal
Sound Pressure
• Torr
Pressure
• Curie
Intensity of radioactivity
• Angstrom
Unit of length
• Light
year The distance light travels in a year
• Dioptre Lens
refractive power
• Horse
power Unit of Power
• Radian
Unit of angular measure
• Candela
Unit of luminous intensity
• Mole
unit of amount of substance
• What is measured in units called phon- Sound 192
• What is measured in grains – four grains to a carat- Pearls
• Unit of
electromotive force in Volt.
• Gross is
equal to 12 dozen.
• Ozone is
measured in percent age.
• An object traveling at Mach 2 is traveling approximately at 500
mph.(chk)
• What is measured on the Gay-Lussac scale: Alcohol strength
• Chronometer
is used to measure… time
• Anemometer
is used to measure… Wind Speed
• The clusec is the unit measuring the power of what Vacuum pumps
• One million cycles per second is called Megahertz.
• 0.200
grams are equal to one carat.
• Volta meter is an electrolytic cell for conducting electrolytic
dissociation of electrolyte.
• 8
furlongs make one mile.
• 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.
• One inch is equal to 2.5400 cms and one mile is equal to 1.6093 kms.
• 2.47105
acres is equal to what SI unit-Hectare
• What word describes one tenth of a nautical mile-Cable
• What is
measured on the Torro scale -Tornados
• unit of sound named after- Alexander Graham Bell – Decibel
• The density Smoke is measured on the Rngelmann scale-
• Unit of
electromotive force in Volt.
• Power is
measured in Watts (w).
• Resistance was discovered by Girge Ohm in 1826, and is measured in ohms.
• 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).
• 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.
• The thickness of silk is measured in what-Denier
• Ohm’s law does not apply to semiconductors and conductors when there is
change in temperature.
• In our houses we get 220 V a.c. The value of 220 V represents the
effective voltage.
• One unit of electric power is consumed when 10 A of current flows for 1
hour at 100 V. 1 Unit = 1 kw hr = 1000 w hr = 100 x 10 x 1 hr
• If the same note is played on a flute and a sitar, one can still distinguish b/w them because they differ in quality.
• A negatively charged glass rod has always less protons than electrons.
• The
wavelength of the X-rays is of the order of
0.1 nanometer.
• Red, green and blue are known as primary colours. These are colours
which cannot be produced by mixing with other colours.
• Scattering
of light ___ the duration of the day (make)
• 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)
• When a person can see nearer objects but not the distant ones he is said
to be suffering from : nearsightedness (myopia)
• ATP is a molecule containing high energy bonds.
• An example of inorganic compound is carbon monoxide.
• The time period of a pendulum on moon increases.
• Clinical thermometer usually measures in Fahrenheit.
• Tube light emits radiation even after it is disconnected. It is due to
Fluorescence.
• Shortsightedness can be corrected with the use of Concave.
• Rectifier
converts AC into DC
• Atomic weight of chemical compounds is determined by Mass spectroscopy.
• Atomic pile is a place where nuclear fission is made.
• Dewar’s
flask is called as thermos.
• The conversion of gases into liquid under high pressure and low temperature is called regulation.
• If a green leaf is seen in a red light its color will be black.
• Emerge of VIBGYOR from one side of the prism is due to refraction and dispersion of light.
• Oxidation is the process in which electron is lost.
• Half-time is a time of radioactive substance taken by that substance to
decompose radioactivity to half of its weight.
• Light energy is stored in the form of chemical energy due to the activity of Chloroplast.
• Sunlight
is composed of seven colours
• Oil rises in a wick of oil lamp on account of a property of matter called Capillary Action
• What is
a Fata Morgana- Type of Mirage
• Freon-trademark for any
of a number of
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