Asked/Added Questions From NCERT:

 If the dimensions of the left hand side of an equation are equal to the dimensions of right hand side of the equation is dimensionally correct. this is known as Homogeneity Principle. 

-Answered by Himanshi Verma On 25 November 2020:01:00:47 PM

-Answered by Shruti Srivastva On 09 July 2020:06:15:59 PM

-Answered by Anjali Kumari On 15 October 2020:07:35:34 PM

-Answered by Anjali Kumari On 15 October 2020:07:47:06 PM

 It is a metric, rational, coherent, and internationally acceptable system of units which covers all branches of physics.

-Answered by Shruti Srivastva On 08 July 2020:06:31:32 PM

-Answered by Anjali Kumari On 15 October 2020:07:49:51 PM

 Radian and Steradian.

-Answered by Shruti Srivastva On 08 July 2020:06:29:54 PM

 Metre, Kilogram, Second, Ampere, Kelvin, Candela, Mole. 

-Answered by Shruti Srivastva On 08 July 2020:06:27:50 PM

-Answered by Anjali Kumari On 15 October 2020:07:51:06 PM

-Answered by Anjali Kumari On 15 October 2020:07:51:47 PM

-Answered by Anjali Kumari On 18 October 2020:06:53:05 PM

-Answered by Anjali Kumari On 23 October 2020:06:50:35 PM

 The physical quantities whose defining operations are based on other physical quantities are called derived quantities. 

-Answered by Shruti Srivastva On 08 July 2020:06:21:59 PM

-Answered by Shruti Srivastva On 08 July 2020:06:07:30 PM

 Gravitational constant, Planck's constant and Boltxmann's constant.

-Answered by Shruti Srivastva On 08 July 2020:06:08:19 PM

 Specific gravity and strain.

-Answered by Shruti Srivastva On 08 July 2020:06:12:43 PM

 Specific Gravity and strain.

-Answered by Shruti Srivastva On 08 July 2020:06:09:17 PM

 All such zeroes are not significants For example 86,400 has three significant figures.

-Answered by Shruti Srivastva On 08 July 2020:06:11:05 PM

 (i) 4.0 cm has two significant figures while 4.000 cm has four significant figures.

(ii) 4.0 cm is correct upto first decimal place while 4.000 cm is correct upto third place of decimal.

-Answered by Shruti Srivastva On 08 July 2020:06:13:38 PM

 speed.

-Answered by Shruti Srivastva On 08 July 2020:06:16:54 PM

-Answered by nisha sheikh On 23 October 2020:07:01:05 PM

 The principle of homeginetyu of dimensions states that a physical equation will be dimensionally correct if the dimensions of all the terms occuring on both sides of the equations are the same.

-Answered by Shruti Srivastva On 08 July 2020:01:48:45 PM

 The dimensions of a physical quantity are the powers to which the fundamental quantities must be raised to represent that quantity complete.

-Answered by Shruti Srivastva On 08 July 2020:01:46:13 PM

 5.38 X 10^-6.

-Answered by Shruti Srivastva On 08 July 2020:01:44:29 PM

 6.96 X 10⁸m.

-Answered by Shruti Srivastva On 08 July 2020:01:42:14 PM

 Density = 500 kg m^-3.

-Answered by Shruti Srivastva On 08 July 2020:01:40:05 PM

 Tropical year.

-Answered by Shruti Srivastva On 08 July 2020:01:38:31 PM

 Leap year is the year which is divisible by 4. The February month of a leap year has 29 days.

-Answered by Shruti Srivastva On 08 July 2020:01:35:47 PM

 One candela is defined as the luninous intensity, in a given direction, of a source than emits a mochromatic radiaton of frequency 540 X 10¹² hertz and has a radiant intensity in that direction of 1/683 watt per sterdian. 

-Answered by Shruti Srivastva On 08 July 2020:01:28:32 PM

 Kelvin.

-Answered by Shruti Srivastva On 08 July 2020:01:24:00 PM

 1 millisecond = 10^-3 microsecond.

-Answered by Shruti Srivastva On 08 July 2020:01:13:58 PM

 One second is defined as the duration of 9192, 631, 770 vibrations corresponding to the transition between two hyperfine levels of cesium-133 atom in the ground state.

-Answered by Shruti Srivastva On 08 July 2020:12:58:13 PM

 1 Teregram = 10⁹ kg.

-Answered by Shruti Srivastva On 08 July 2020:12:52:25 PM

 1 Teregram = 10¹² g. 

-Answered by Shruti Srivastva On 08 July 2020:12:50:49 PM

 One atomic mass unit is the mass of 1/12th of the mass of an atom of carbon-12 isotope.

-Answered by Shruti Srivastva On 08 July 2020:12:38:42 PM

 1 light year = 0.946x10¹⁶m.

-Answered by Shruti Srivastva On 08 July 2020:12:30:12 PM

 Screw gange.

-Answered by Shruti Srivastva On 07 July 2020:06:42:58 PM

 Vernier callipers.

-Answered by Shruti Srivastva On 07 July 2020:06:42:14 PM

 One micron is one millionth part of a metre.

-Answered by Shruti Srivastva On 07 July 2020:04:48:03 PM

 1 parasec= 3.08 X 10¹⁶m

-Answered by Shruti Srivastva On 07 July 2020:04:38:51 PM

 One light is defined as the distance traveled by light in one year.

-Answered by Shruti Srivastva On 07 July 2020:04:29:52 PM

 Because of the tremendous accuracy achieved in the measurement of time, metre has been redefined in terms of velocity of light since 1983.

-Answered by Shruti Srivastva On 07 July 2020:02:02:49 PM

 Standard metre is defined as the distance which contains 1650,763.73 wavelengths of certain orange-red radiation emitted by Kr-86 atom in its transition between 2p₁₀ and 2d₅ levels.

-Answered by Shruti Srivastva On 07 July 2020:01:57:16 PM

 In 1899, the general  conference of weights and measures defined metre as the distance between two transverse lines marked on a platinum-iridum rod preserved at a consonant temperature af 273.16 K at 1 bar pressure an the International Burea of Weights and Measures at Serves, near Paris in France. 

-Answered by Shruti Srivastva On 07 July 2020:01:51:11 PM

 The standard amount of a physical quantity chosen to measure the physical quantity of the same kind is called a physical quantity.

-Answered by Shruti Srivastva On 07 July 2020:01:39:05 PM