TNPSC - Physics Exam Material Part 2
Physics Exam material for TNPSC - PART 2
The Light emerging from a nicol prism has --- vibration in two mutually perpendicular directions
The Unit of refractive index --- no index
Glass -- One type of Insulator
A radar which detects the presence of the enemy aircraft uses --- radio waves
The most basis of all test instruments is the -- Galvanometer
The energy gap of diamond is - 7ev
The positron is called the antiparticle of the electron, because it -- has opposite charge
The radioactive decay follows --- N=Noe-at
Gamma - rays can be detected by passing them through - electric and magnetic fields
Magnetron is used for the production of -- Microwaves
The Intensity of an earthquake is measured with a - Seismograph
Which one of the following function is performed by a photo-cell ----It converts light energy into electrical energy
Alternating current is converted into direct current by --- Rectifier
The fuse wire is made of -- lead -tin alloy
Sun spots are -- the magnetic storms on the surface of the sun
The radiation with highest energy is -- X-ray
A lift is falling freely after the suspension wire breaks. The weight of a person inside the life would become -- Zero
Which of the following action will double the period of a simple pendulum? --- make the pendulum four times long
What makes the hairs of shaving brush cling together? --- Surface tension
Centripetal force needed to keep the moon in its orbit round the earth is provided by --- gravitational pull of sun
Bats can fly in the dark without hitting anything because --- they are guided by ultrasonic waves produced by them
As a person moves closer to the plane mirror the size of the image formed by the mirror --- remains the same
Primary colors are -- red, blue and green
A pyrometer is used to measure --- high temperature
For the measurement of very temperature we use --- Mercury thermometer
Control rods used in nuclear reactors are made of --- Cadmium
The force by which a body is attracted towards the centre of the earth is called --- gravitational force
If the depth of floatation of a ship changes when it sails from the Arabian sea to the Indian ocean, it is due to --- change in density of sea - water
A sudden decrease in the barometric pressure indicates --- a stormy weather
The lens used to rectify long sight is --- convex lens
A solar eclipse occurs when -- the moon comes between the sun and the earth
Important Points :
Soft iron is used for magnetic shielding.
Soft iron attracts the maximum number of magnetic into it
Transformers are used to --- step up or step down AC voltage
Important Points :
Wavelengths of x-rays are in between 1 A to 100 A
The instrument used to measure the intensity of ionisation of radiation is -- Geiger counter
The instrument used to test the purify of milk is --- Lactometer
The velocity of a freely falling body --- increase
Important Points :
Pressure is measured in newton per m2
Stress is the force acting on unit area.
Stress and pressure have the same unit.
Momentum of a moving body --- depends upon its velocity alone
The kinetic energy of a body depends upon --- both mass and velocity
Least distance of distinct vision is nearly equal --- 0.25 metre
The electromagnetic waves are of --- transverse in nature
Important Points :
Boyle's Law ---
Charle's Law ---
Sublimation ---
Gas equation --- PV=RT
Land and sea breeze are due to --- Conversion of heat
If sound persists even after its source has stopped producing sound, then its called --- Reverberation
Reed instrument without pipe is --- Harmonium
The instrument, which is used to measure the current flowing through a circuit is --- Ammeter
The magnetic permeability of free space is --- 4
x10-7h/m
Beta particles are --- electrons
Which one of the following statements given below is not correct ? --- X-rays are charged particles
Phenomenon of radioactivity was discovered by --- Becquerel
Which falls down fastest in vaccum, a feather, a wooden or a steel ball ? --- all will fall down at the same speed
What is the normal body temperature of a human body ? --- 37oC
A micron is equivalent to --- 1/1000 mm
The phenomenon of increase in the temperature of the earth's atmosphere due to absorption of the infra-red radiations reflected from the earth's surface is called --- Green House Effect
Why do we prefer white clothes in summer --- they are poor absorbers and good emitters
A bob executes simple harmonic motion which value is maximum when bob is in the mean position? --- mass of the particle
The scientist who discovered the relation between electricity and magnetic effects --- Oersted
For a transversely vibrating string the frequency of vibration is directly proportional to --- its length
The exclusive principle was proposed by --- pauli
The momentum of a body of mass metal moving with constant velocity is --- mv
The period of oscillation of a simple pendulum --- decrease with length
The weight of the body at the centre of the earth is --- Zero
By the use of cold water, how will you separate two tumblers stuck together into each other ? ---pouring cold water in the outer tumbler
A rainbow is caused by --- Total internal reflection
Water drops are spherical because of its ---- Surface tension
Loudness of sound produced by a vibrating string is directly proportional to --- the amplitude
The reflectivity of a perfect black body is --- zero
Joule is the unit of --- energy
The color of light is determined by its --- wavelength
Wave theory was proposed by --- Huygen
Charge of an electron is ---1.6x10-19369coulomb
The common emitter configuration is more preferred that the common base configuration because the common emitter configuration gives --- high current gain, high voltage gain and high power gain
Crystals having low melting points are in --- Metallic bond
In a AC Circuit containing capacitance only --- current lags the emf by -----180
Substances which lose their electrical resistances at very low temperature are called --- Super -conductors
Einstein was awarded Nobel Prize for --- Photo electric effect
Two man talk on moon --- they cannot hear each other at all
In mountains because of the low atmospheric pressure the boiling point of water --- decrease
By centrifugal action we can separate particles by different --- densities
Important Points :
Anemometer --- Wind Speed
Ammeter --- Electric current
Tachometer --- Speed of rotation
Pyrometer --- High temperature
Raman effect is due to --- Scattering of light
A diamond shines brightly because it has --- high refractive index and low critical angle
Water in a lake and nearby wells seeks the same level because of --- the same atmospheric pressure
The base of an electric iron is highly polished mainly to --- reduce heat loss by radiation
Electronic devices that convert D.C. power into A.C power are called --- Inverters
The heating element in an electric stove is made of --- nichrome
The least distance of distinct vision is --- 25cm
The first satellite launched by India is --- Aryabhatta
Aeroplane was invented by --- Orville and Wilbur Wright
What is the principle of a thermopile ? --- Crompton effect
Who proposed the wave theory of light ? --- Huygens
According to Kepler's first law of planetary motion, planets move in --- elliptical orbits
The value of gravitation constant G is --- 6.673x10-11Nm2Kg-2
x10-7h/mBeta particles are --- electrons
Which one of the following statements given below is not correct ? --- X-rays are charged particles
Phenomenon of radioactivity was discovered by --- Becquerel
Which falls down fastest in vaccum, a feather, a wooden or a steel ball ? --- all will fall down at the same speed
What is the normal body temperature of a human body ? --- 37oC
A micron is equivalent to --- 1/1000 mm
The phenomenon of increase in the temperature of the earth's atmosphere due to absorption of the infra-red radiations reflected from the earth's surface is called --- Green House Effect
Why do we prefer white clothes in summer --- they are poor absorbers and good emitters
A bob executes simple harmonic motion which value is maximum when bob is in the mean position? --- mass of the particle
The scientist who discovered the relation between electricity and magnetic effects --- Oersted
For a transversely vibrating string the frequency of vibration is directly proportional to --- its length
The exclusive principle was proposed by --- pauli
The momentum of a body of mass metal moving with constant velocity is --- mv
The period of oscillation of a simple pendulum --- decrease with length
The weight of the body at the centre of the earth is --- Zero
By the use of cold water, how will you separate two tumblers stuck together into each other ? ---pouring cold water in the outer tumbler
A rainbow is caused by --- Total internal reflection
Water drops are spherical because of its ---- Surface tension
Loudness of sound produced by a vibrating string is directly proportional to --- the amplitude
The reflectivity of a perfect black body is --- zero
Joule is the unit of --- energy
The color of light is determined by its --- wavelength
Wave theory was proposed by --- Huygen
Charge of an electron is ---1.6x10-19369coulomb
The common emitter configuration is more preferred that the common base configuration because the common emitter configuration gives --- high current gain, high voltage gain and high power gain
Crystals having low melting points are in --- Metallic bond
In a AC Circuit containing capacitance only --- current lags the emf by -----180
Substances which lose their electrical resistances at very low temperature are called --- Super -conductors
Einstein was awarded Nobel Prize for --- Photo electric effect
Two man talk on moon --- they cannot hear each other at all
In mountains because of the low atmospheric pressure the boiling point of water --- decrease
By centrifugal action we can separate particles by different --- densities
Important Points :
Anemometer --- Wind Speed
Ammeter --- Electric current
Tachometer --- Speed of rotation
Pyrometer --- High temperature
Raman effect is due to --- Scattering of light
A diamond shines brightly because it has --- high refractive index and low critical angle
Water in a lake and nearby wells seeks the same level because of --- the same atmospheric pressure
The base of an electric iron is highly polished mainly to --- reduce heat loss by radiation
Electronic devices that convert D.C. power into A.C power are called --- Inverters
The heating element in an electric stove is made of --- nichrome
The least distance of distinct vision is --- 25cm
The first satellite launched by India is --- Aryabhatta
Aeroplane was invented by --- Orville and Wilbur Wright
What is the principle of a thermopile ? --- Crompton effect
Who proposed the wave theory of light ? --- Huygens
According to Kepler's first law of planetary motion, planets move in --- elliptical orbits
The value of gravitation constant G is --- 6.673x10-11Nm2Kg-2
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