Exercise Solutions for Physics Chapter 1 : Units and Measurements : Class 11th Maharashtra State Board : All Questions and Answers

Standard XI - Physics : Chapter 1 : Units and Measurements : Exercise Solutions : Complete Questions and Answers with Explaination

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Units and Measurements : Excercise Solutions

EXERCISE- 

1. Choose the correct option.

i) [L¹M¹T-²] is the dimensional formula for 

A) Velocity B) Acceleration C) Force D) Work

Answer : C) Force

ii) The error in the measurement of the sides of a rectangle is 1%. The error in the measurement of it area is

A) 1% B) 1/2% C) 2% D) None of the Above 

Answer: C) 2%

iii) Light year is a unit of 

A) Time  B) Mass C) Distance  D) Luminosity

Answer : C) Distance 

iv) Dimensions of kinetic energy are same as that of 

A) Force B) Acceleration C) Work D) Pressure

Answer : C) Work

v ) Which of the following is not a fundamental unit?

A) cm B) kg C) centigrade D) volt

Answer : D) volt


2) Answer the following questions

Q2-ii ) What are the dimensions of the quantity l root l/g,  l   being the length and g the acceleration dur to gravity. 




Q3-ix) An object is falling freely under the gravitational force. It's velocity after travelling a distance h is v. If v depends upon the gravitational acceleration g and distance, prove with dimensional analysis that v = k underroot gh  where k is a constant.




Q3- xvi) The diameter of a sphere is 2.14 cm.  Calculate the volume of sphere to the correct number of significant figures.




More questions coming soon.