EASY
JEE Main
IMPORTANT
Earn 100

Suppose you are told that the linear size of everything in the universe has been doubled overnight. Can you test this statement by measuring sizes with a metre stick? Can you test it by using the fact that the speed of light is a universal constant and has not changed? What will happen if all the clocks in the universe also start running at half the speed?
 

Important Questions on Introduction to Physics

MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>QUESTIONS FOR SHORT ANSWER>Q 4
If all the terms in an equation have the same units, is it necessary that they have the same dimensions? If all the terms in an equation have the same dimensions, is it necessary that they have the same units?
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>QUESTIONS FOR SHORT ANSWER>Q 5
If two quantities have the same dimensions, do they represent the same physical content?
 
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>QUESTIONS FOR SHORT ANSWER>Q 6
It is desirable that the standards of units be easily available, invariable, indestructible and easily reproducible. If we use the foot of a person as a standard unit of length, which of the above features are present and which are not?
 
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>QUESTIONS FOR SHORT ANSWER>Q 7

Suggest a way to measure:

(a) the thickness of a sheet of paper and

(b) the distance between the sun and the moon.

EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>OBJECTIVE I>Q 1
Which of the following sets cannot enter into the list of fundamental quantities in any system of units?
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>OBJECTIVE I>Q 2
A physical quantity is measured and the result is expressed as nu, where u is the unit used and n is the numerical value. If the result is expressed in various units, then
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>OBJECTIVE I>Q 3
Suppose a quantity, x can be dimensionally represented in terms of M, L and T that is, [x]=MaLbTc. The quantity mass
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 1 - Introduction to Physics>OBJECTIVE I>Q 4
The dimensionless quantity