Statement 1: Positive zero error is added in measured value.
Statement 2: Defect may occur during manufacturing of measuring instruments
Statement 2: Defect may occur during manufacturing of measuring instruments
- Statement 1 is true while statement 2 is false
- Statement 1 is false while Statement 2 is true
- Both statements are true
- Both statements are false
The Correct Option is B
Solution and Explanation
Top Questions on Units and measurement
- Given below are two statements: Statement I : In a vernier callipers, one vernier scale division is always smaller than one main scale division. Statement II : The vernier constant is given by one main scale division multiplied by the number of vernier scale divisions. In light of the above statements, choose the correct answer from the options given below.
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Match the LIST-I with LIST-II
LIST-I LIST-II A. Boltzmann constant I. \( \text{ML}^2\text{T}^{-1} \) B. Coefficient of viscosity II. \( \text{MLT}^{-3}\text{K}^{-1} \) C. Planck's constant III. \( \text{ML}^2\text{T}^{-2}\text{K}^{-1} \) D. Thermal conductivity IV. \( \text{ML}^{-1}\text{T}^{-1} \) Choose the correct answer from the options given below :
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Questions Asked in JEE Main exam
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A point particle of charge \( Q \) is located at \( P \) along the axis of an electric dipole 1 at a distance \( r \) as shown in the figure. The point \( P \) is also on the equatorial plane of a second electric dipole 2 at a distance \( r \). The dipoles are made of opposite charge \( q \) separated by a distance \( 2a \). For the charge particle at \( P \) not to experience any net force, which of the following correctly describes the situation?
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A uniform circular disc of radius \( R \) and mass \( M \) is rotating about an axis perpendicular to its plane and passing through its center. A small circular part of radius \( R/2 \) is removed from the original disc as shown in the figure. Find the moment of inertia of the remaining part of the original disc about the axis as given above.
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Concepts Used:
Units and Measurement
Unit:
A unit of a physical quantity is an arbitrarily chosen standard that is broadly acknowledged by the society and in terms of which other quantities of similar nature may be measured.
Measurement:
The process of measurement is basically a comparison process. To measure a physical quantity, we have to find out how many times a standard amount of that physical quantity is present in the quantity being measured. The number thus obtained is known as the magnitude and the standard chosen is called the unit of the physical quantity.
Read More: Fundamental and Derived Units of Measurement
System of Units:
- CGS system
- FPS system
- MKS system
- SI units
Types of Units:
Fundamental Units -
The units defined for the fundamental quantities are called fundamental units.
Derived Units -
The units of all other physical quantities which are derived from the fundamental units are called the derived units.