Interview Questions.

Question 1. What Is Meant By Units?

Answer :

The reference trendy for measurement is referred to as unit.

Question 2. What Is The Need For Measuring A Physical Quantity?

Answer :

The size of bodily amount is important because with out it, we will’t look at the function capabilities of the trouble.

General Knowledge Interview Questions
Question three. What Is Fundamental Physical Quantity?

Answer :

There are seven physical quantities i.E. Period, mass, time, electric powered present day, temperature, light intensity, and amount of substance are called fundamental bodily portions.

Question 4. What Is Metrology?

Answer :

Metrology is defined with the aid of the ‘International Bureau of Weights and Measures’ (BIPM) because the technological know-how of measurement embracing each experimental and theoretical determinations at any level of uncertainty within the feild of Science and Technology.

General Knowledge Tutorial
Question five. What Is The Common System Of Unit For Describing Measurements?

Answer :

The commonplace systems are the C.G.S. Gadget, the F.P.S device, the M.K.S machine, and the S.I. Device.

Physics Interview Questions
Question 6. What Is The C.G.S System?

Answer :

It is based totally upon three simple devices, the centimeter, the gram and the second one for the duration, the mass and the time measurements respectively.

Question 7. What Is The F.P.S System Or The British System?

Answer :

It is based on three fundamental devices, the foot, the pound and the second for the period, the mass and the time, respectively.

Machine Dynamics Interview Questions
Question eight. What Is M.Ok.S System?

Answer :

It is based upon the 3 basic devices, the metre, the kilogram and the second one for the length, the mass and the time respectively.

Question nine. What Is S.I System?

Answer :

This machine is now the world over regularly occurring. It stands for the system International d’ units. These are the metre (m) for period, the kilogram (kg) for mass, the second (s) for the time, Kelvin (ok) for temperature, ampere (A) for the modern, candela (cd) for mild depth and mole (mol) for amount of substance. This system is utilized by almost all the countries of the sector.

Light Interview Questions
Question 10. S.I System Is Used All Over The World. Why?

Answer :

All the devices are nicely described and without difficulty reproducible on the whole place. All the gadgets do now not alternate with time, area, strain, temperature and many others., due to the fact they depend upon a few essential property of the atom. In S.I device the unit of electricity (all paperwork) is joule and watt because the unit of power.

Question eleven. What Is Meant By Length?

Answer :

The distance of separation among  points in space is known as length.

Photon Interview Questions
Question 12. What Is The Relation Between The Magnitude And The Unit Of A Physical Quantity?

Answer :

A particular bodily quantity expressed in a bigger unit has a smaller significance and vice versa.

General Knowledge Interview Questions
Question 13. Why Do We Need Indirect Methods Of Measurement Of Certain Distances?

Answer :

When it isn't possible to degree a specific distance by way of its direct comparison with a certain wellknown, we want oblique strategies. We need indirect methods when the gap to be measured is both too big or too small.

Question 14. Which Units Are Used For Measuring Distance Of The Order Of Astronomical Distance?

Answer :

Light 12 months; 1 mild year = 9.Forty six * 1015 metres
Astronomical units ( A.U ) ; 1 A.U= 1.496 * 1011 metres , One Astronomical Unit ( A.U ) is the distance among the earth and the solar.
Question 15. Which Is The Unit Used To Express The Distance Of Stars From The Earth?

Answer :

Parsec (Parallactic 2nd)
1 parsec = 3.08 * 1016m
Matter Interview Questions
Question sixteen. Which Units Are Used For Measuring Atomic Or Molecular Distance?

Answer :

Micron. 1 Micron = 10-6
Mill micron. 1 Mill micron = 10-9
Angstrom Unit ( A ). 1 A = 10-10
Fermi. (f) 1 f = 10-15
Question 17. Which Are The Indirect Methods To Measure Very Large Distance?

Answer :

Angular distance approach
Parallax approach
Reflection Method
Earthquake Interview Questions
Question 18. What Is The Term Parallax Means?

Answer :

The obvious shift of a frame with respect to every other, with the shift of eye is referred to as parallax. The nearer frame always seems to move in a direction contrary to that of the eye.

Physics Interview Questions
Question 19. How Can We Determine The Distance Of The Moon From The Earth By Reflection Method?

Answer :

To find out the distance among moon and earth, we ship a radar signal from earth to be able to be meditated from the floor of moon again to the receiver. If the time between sending and receiving of the signal be “ t ” and “ v ” be the rate of the sign, the distance between moon and the earth is v * t / 2. A radar signal travels with the speed of light i.E. Equal to 3 * 108 m/s.

Question 20. Define The Term Mass?

Answer :

Mass of an object is the quantity of be counted contained inside the items. It is the simple property of count number. It is a consistent amount i.E. It does not depend upon temperature, strain and location of the item in space.

Asia Interview Questions
Question 21. Mention Some Applications Of Reflection Methods?

Answer :

To decide the thickness of a piece of be counted.
RADAR (Radio detection and ranging), to determine the space of an aeroplane from radar station.
SONAR (Sound Navigation and Ranging), to decide distance of a submarine, in non - detrimental, mechanical testing of materials.
Question 22. What Is The Decibel Scale?

Answer :

The distinction in amplitude among the quietest sounds and sounds so loud they harm is almost too exceptional to jot down down in numbers. The decibel scale is an instance of a logarithmic scale.

Question 23. What Is A Decibel (db)?

Answer :

A unit used to explicit the intensity of a legitimate wave. It is measured on a logarithmic scale.

Solar System Interview Questions
Question 24. What Is Dead Time?

Answer :

The time c program languageperiod straight away following a stimulus for the duration of which it's miles insensitive to every other stimulus.

Machine Dynamics Interview Questions
Question 25. What Is Bomb Calorimeter?

Answer :

A type of calorimeter measuring the heat evolved via the combustion of a gas.

Question 26. What Is Astronomical Unit (a.U)?

Answer :

A unit or distance in astronomy in the sun machine. It is same to about 1.496 * 1011 metre. That is the mean distance of sun from earth.

Question 27. Define Weight Of A Body?

Answer :

Weight is the force with which a body is pulled closer to the earth. It is the fabricated from the mass and the acceleration due to gravity at that location.

Light Interview Questions
Question 28. Distinguish Between And Weight?

Answer :

Mass: It is the quantity of count number contained in the object. It is a constant amount. It is measured in kilogram. It is a scalar quantity. It is measured by using the physical stability.

Weight: It is the pressure with which the frame is pulled towards the earth. It isn't always a constant amount. It is measured in newton. It is a vector quantity. It is measured with the aid of a spring stability.

Question 29. What Will Be The Weight Of An Object Of Mass In Kilogram In Space Away From Earth?

Answer :

It is 0, due to the fact g = zero in area.

Question 30. What Is Force?

Answer :

It is some corporation which has a tendency to exchange the movement of an object, either its nation or its path.

Question 31. Define Interia?

Answer :

The tendency of an item to oppose any alteration in its state of rest or a uniform movement is known as interia.

Question 32. What Is Meant By Base Units?

Answer :

The gadgets of duration, mass, time, temperature, electric powered current, light depth and amount of substance are called base gadgets.

Question 33. What Are Natural Units?

Answer :

Systems of devices based totally on arbitrary unit values, formalized as requirements, some unit values occur obviously in technology, structures of devices based totally on these are called herbal gadgets.

Photon Interview Questions
Question 34. Which System Of Measurement Was Standardized First?

Answer :

The metric system turned into standardized in France among 1791 and 1795, the imperial system in England 1824.

Question 35. The Intensity Of The Second Is Measured In Which Units?

Answer :

Decibel.

Question 36. What Is Ampere?

Answer :

Unit of electric present day, one ampere present day is equal to the waft of 1 coloumb of fee per 2nd. It is almost same to the glide of 6 * 1018 electrons / 2d.

Matter Interview Questions
Question 37. What Is Anemometer?

Answer :

An device used for measuring the speed of the wind or any other flowing fluid. The easy anemometer is made of a number of cups or blades.

Question 38. What Is Emissive Power?

Answer :

The overall energy emitted from unit floor area of body per 2d.

Question 39. What Is Chronotron?

Answer :

A device used for measuring the time c program languageperiod between events.

Question forty. Time Taken By Light To Reach From The Sun To The Earth In 8 Minutes And 20 Seconds. The Speed Of Light Is 3 * 10 eight M/s. If The New Unit Of Length Is Taken Such That Speed Of Light Is 1, What Is The Distance Between The Sun And Earth In New Units?

Answer :

500 new gadgets.

Earthquake Interview Questions
Question 41. What Is The Unit Used To Measure Electromotive Force?

Answer :

Volt.

Question forty two. What Is The Unit Of Area For Measuring The Cross Section Of Nuclei?

Answer :

Barn.

Asia Interview Questions
Question 43. Barn Is Equal To?

Answer :

10-24 cm2

Question 44. What Is The Logarithmic Unit Expressing The Ratio Of Power, Voltage, Current Or Sound Intensity?

Answer :

Bel.

Question 45. What Is The Name Of The Unit Of Frequency Equal To 1012 Hz?

Answer :

Hertz.

Question forty six. An Altimeter Is Used For Measuring What?

Answer :

Altitude.

Question forty seven. What Is Unit Of Power?

Answer :

Watt.

Question forty eight. Cresco Graph Is Used To Measure The?

Answer :

Rate of plant growth.

Question forty nine. Who First Introduced The Modern Concept Of Mass?

Answer :

Isaac Newton.

Question 50. What Is Unit Of Magnetic Flux?

Answer :

Newton in line with metre.

Question fifty one. What Is Hertz?

Answer :

Hertz is the unit of frequency.

Question 52. What Was The Name Of The Unit Of Heat Now Replaced By The Joule?

Answer :

Calorie.

Question fifty three. What Is Calorie?

Answer :

Unit of heat identical to the amount had to improve the temperature of 1 gm. Water via 1oC.

Question fifty four. What Is Smallest Unit Of Length?

Answer :

Fermi.

Question 55. What Is ‘ampere’ Per Metre?

Answer :

It is the S.I unit of magnetic discipline strength.

Question 56. What Is Unit Of Illumination?

Answer :

Lux.

Question fifty seven. What Is The Mass Of A Proton?

Answer :

1.672 * 10 -27kg.

Question fifty eight. Time Period Of Ultrasonic Wave?

Answer :

10 -5 s.

Question 59. What Is The Unit Of Electromotive Force?

Answer :

Volt.

Question 60. Who Formulated The Laws Of Motion?

Answer :

Issac Newton.

Question 61. How Many Motions Are Caused When A Ball Is Thrown?

Answer :

When a ball is thrown it movements in  approaches at the identical time, forwards at a steady speed and downwards because of gravity of the earth.

Question 62. What Will The Weight Of A Body At The Centre Of The Earth?

Answer :

Zero.

Question sixty three. What Will Be The Speed Of Two Cars Racing At The Same Speed?

Answer :

They have a relative velocity of zero.

Question sixty four. What Will Be The Terminal Velocity For A Sky Diver Falling In A Flat Position?

Answer :

About 190 km / hour.

Question sixty five. What Is Terminal Velocity?

Answer :

A falling item from the sky hurries up as it falls. Friction among the object and the air, acts against the gravity. Air resistance increases as the item falls quicker and when it equals the force of gravity, the item stops accelerating and falls at a constant velocity.

Question sixty six. Which Unit Is Used To Measure Supersonic Speed?

Answer :

Mac.

Question 67. Who Discovered The Relation Between Gas Pressure And Volume?

Answer :

Robert Boyle.

Question sixty eight. What Is The Unit Of Length?

Answer :

Metre.

Question sixty nine. What Is Unit Of Pressure?

Answer :

Pascal.

Question 70. How Is The Electricity For Domestic Purpose Measured?

Answer :

Kilo watt hour (kWh).

Question 71. What Is The S.I Unit Of Current?

Answer :

Ampere.

Question seventy two. What Is The S.I Unit Of Capacitance?

Answer :

Farad.

Question 73. What Is Called The Measure Of Number Of Field Lines Penetrating A Surface?

Answer :

Electric flux.

Question seventy four. What Is Kelvin?

Answer :

Unit of temperature c language.

Question seventy five. What Is The Unit Of Potential?

Answer :

Volt.

Question 76. What Is Measured By The S.I Unit Called A Henry?

Answer :

Inductance.

Question seventy seven. What Is Horse Power?

Answer :

Unit of power, identical to paintings finished on the rate of 550 ft. Lb / sec.

Question 78. Which Swedish Scientist Had A Temperature Scale Named After Hime?

Answer :

Andres Celsius.

Question 79. What Is The Absolute Unit Of Work In Cgs System?

Answer :

Erg.

Question 80. What Is A Fahrenheit?

Answer :

Temperature scale on which melting factor of ice is 320 F and the boiling point of water is 2120F.

Question eighty one. In Which Country The Beam Balance Was First Used?

Answer :

Egypt.

Question 82. What Is Freezing Point Of Mercury In Celsius Scale?

Answer :

-39 o C.

Question eighty three. What Is Curie?

Answer :

It is unit of dimension of radioactivity.

Question 84. What Is Electric Charge Of An Electron?

Answer :

1.6 * 1019 Coulomb.