Get Dream IIT in Drop Year | Up to 70% OFF | Limited Seats

# Important Questions of Units and Measurement Class 11 Physics

Get important questions of Units and Measurement Class 11 Physics exams. View 11th Physics other chapters' important questions for exam point of view. These important questions will play significant role in clearing concepts of the subject. This question bank is designed by top IITian Faculties keeping NCERT in mind and the questions are updated with respect to upcoming Board exams.

You will get here all the important questions with answers for class 11 Physics Chapter Units and Measurement. Click Here for Detailed Notes of Units and Measurements along with any chapter.

Q. What is a unit? Give an example.
Ans.
Q. What is the necessity of selecting some units as fundamental units?
Ans.
Q. Define the S.I. unit of solid angle.
Ans.
Q. Define light year.
Ans.
Q. Define a parsec.
Ans.
Q. What is the largest practical unit of mass?
Ans.
Q. What is lunar month?
Ans.
Q. How many shakes are there in 1 second?
Ans.
Q. What is a leap year?
Ans.
Q. The farthest objects in our universe are known as quasars (quasi-stellar radio sources). Much is not known about these objects. Electromagnetic wave emitted by quasars take billions of years to reach earth. Calculate distance of a quasar from which electromagnetic wave take three billion years to reach earth. [NCERT]
Ans.
Q. The radius of the hydrogen atom is nearly 0.5 A.What is the total atomic volume in of a mole of hydrogen atoms? [NCERT]
Ans.
Q. The moon is observed from two diametrically opposite points and on earth. The angle subtended at the moon by the two directions of observation is ' Given the diameter of earthto be about . Calculate the distance of the moon form the earth. [NCERT]
Ans.
Q. The sun's angular diameter is measured to be 1920. The distance of the sun from the earth is What is the diameter of the sun? [NCERT]
Ans.
Q. Give examples of three physical quantities which have the same dimensions.
Ans.
Q. What is the unit of pressure if the unit of mass is kg, the unit of length is metre and the unit of time is minute?
Ans.
Q. Convert into erg.
Ans.
Q. Calculate the value of force 100 dynes on a system based on a metre, kilogram and minute as fundamental units.
Ans.
Q. What is a vector?
Ans.
Q. What are co-initial and collinear vectors?
Ans.
Q. What is the significance of vector?
Ans.
Q. Can three unequal forces add upto zero?
Ans.
Q. Under what condition the directions of sum and difference of two vectors will be same?
Ans.
Q. Point out the essential condition for the addition of vectors.
Ans.

Q. What is the difference between and
Ans.
Q. Which of the following quantities are independent of the choice of orientation of the co-ordinate axes? angle between and where is a scalar? [NCERT]
Ans.
Q. A vector has magnitude and direction. Does it have a location in space? Will two equal vectors and at different locations in space necessarily have identical physical effects? [NCERT]
Ans.
Q. Pick out the two scalar quantities in the following list: Force, angular momentum, work, current, linear momentum, electric field, average velocity, magnetic moment, reaction as per Newton's third law, relative velocity. [NCERT]
Ans.
Q. Pick out only the vector quantities from the following list: Temperature, pressure, impulse, time, power, total path length, energy, gravitational potential, coefficient of friction and charge. [NCERT]
Ans.
Q. Can you associate vectors with (i) length of a wire bent into a loop (ii) a plane area (iii) a sphere? [NCERT]
Ans.
Q. A vector has both magnitude and direction. Does that mean anything that has magnitude and direction is necessarily a vector? The rotation of a body can be specified by the direction of the axis of rotation and the angle of rotation about the axis. Does that make any rotation a vector? [NCERT]
Ans.
Q. The position of a particle is given by $\left.3.0 t \hat{i}+2.0 t^{2} \hat{j}+5.0 \hat{k}\right)$ [NCERT]
Ans.

##### Download eSaral app to get expert's guidance for Boards,JEE and NEET exam.

Subscribe to eSaral youtube channel for awesome videos of each concept.

Hoppa
July 22, 2024, 6:35 a.m.
Physics?
July 2, 2024, 6:35 a.m.
calculate the value of force 100dynes on a system based on a metre, kilogram and minute as fundamental units...[This question answer wrong] ___________________ as 1g/1000g is 10^-3 rather than 10^-2
Abc
Sept. 15, 2023, 3:48 p.m.
It's very important question and useful for students. Student help for exams i.e. JEE, NEET, NCRT etc.
Mayuresh Yedage
Nov. 3, 2023, 6:35 a.m.
Daut kisse puche
Mayuresh Yedage
Nov. 3, 2023, 6:35 a.m.
Daut kisse puche
Mayuresh Yedage
Nov. 3, 2023, 6:35 a.m.
Daut kisse puche
Mayuresh Yedage
Nov. 3, 2023, 6:35 a.m.
Daut kisse puche
Mayuresh Yedage
Nov. 3, 2023, 6:35 a.m.
Daut kisse puche
Mayuresh Yedage
Nov. 3, 2023, 6:35 a.m.
Daut kisse puche
Mayuresh Yedage
Nov. 3, 2023, 1:28 p.m.
Daut kisse puche
Momin sheikh
May 19, 2024, 6:35 a.m.
Yes?
July 27, 2024, 6:35 a.m.
Spelling to seekh le
Sangram
Sept. 11, 2023, 6:35 a.m.
Question
Sangram
Sept. 11, 2023, 6:35 a.m.
Thanks sir
.....
June 27, 2023, 6:35 a.m.
....
Kanchan lodhi
June 14, 2023, 6:35 a.m.
Thanks 😊 nice question ⁉️
Kanchan lodhi
June 14, 2023, 6:35 a.m.
physics is my favourite and easy subject ☺️
Amit Raut
Sept. 3, 2023, 6:35 a.m.
Ooooo my god
Rishi
June 3, 2024, 6:35 a.m.
Me took
Dec. 6, 2022, 6:54 p.m.
nice question's and embodiment
Prem sekhar jena
Sept. 16, 2022, 7:25 a.m.
What is physics
Snakakakakka
Dec. 14, 2023, 9:34 a.m.
Not study of chemical things is known as physics
Sangeetha A B
July 22, 2024, 6:35 a.m.
Branch of science which deals with the study of nature and matter and energy.
Sangeetha A B
July 22, 2024, 6:35 a.m.
Branch of science which deals with the study of nature and matter and energy.
Sangeetha A B
July 22, 2024, 6:35 a.m.
Branch of science which deals with the study of nature and matter and energy.
Siddarth
July 2, 2022, 7:25 a.m.
Thank you sir
Deepika
Nov. 17, 2021, 3:18 p.m.
Nice sir thnku very much
Zoya
May 1, 2021, 7:18 a.m.
It is not important for us
Tq but phisics is always has doubt
April 6, 2021, 2:27 p.m.
Tq but phisics has always doubt
Sim
March 14, 2021, 11:02 a.m.
Manjunath
March 9, 2021, 6:07 p.m.
What is physics
Rahul
Feb. 18, 2021, 9:35 p.m.
Tq for helping
Anonymous
Dec. 30, 2020, 7:45 p.m.
Thanks a lot
Chandan Gupta
Dec. 6, 2020, 2:19 p.m.
Yuuullll
K.P.Gokulnath
Nov. 19, 2020, 5:13 p.m.
Sarvesh Shinde
Oct. 24, 2020, 10:21 a.m.
Nice questions It's so helping related to examination....
Princhi
Oct. 16, 2020, 8:20 a.m.
Thank you so much
Rakhi
Oct. 12, 2020, 12:48 p.m.
I can't see the answer to this. Where i can see the answers of this question
Rakhi
Oct. 12, 2020, 12:47 p.m.
I can't see the answer to this.
Maheshwaree
Oct. 10, 2020, 9:25 a.m.
thank you so much
Sai
Oct. 7, 2020, 12:03 p.m.
Deafine physical quantity and explane it's type
Neha
Oct. 2, 2020, 11:48 a.m.
Thanks
Rutuja
Oct. 1, 2020, 9:25 a.m.
Thank you so much
Suma
Oct. 1, 2020, 6:57 a.m.
Thanks a lot
anaha
Sept. 19, 2020, 8:49 p.m.
thanks a lot
Sanjana
Sept. 14, 2020, 11:15 a.m.
Riddhi
Sept. 9, 2020, 7:41 p.m.
It was very helpfull,i find it very eazzy to clear my doubts,&amp; learn more n ...more things.Thanku so much😇😇
Khushi
Sept. 6, 2020, 7:53 p.m.
Good question
sristee kapil
Aug. 21, 2020, 10:29 p.m.
dnt provide us importants provide maximum no. of numericals to us plzz dnt let us have the habbit of cooked food but train us enough harder as we can cook food ourselves.thnk u🙏🙏
khushi
July 17, 2020, 10:15 a.m.
very very nice and helpful questions. thankyou
Saksham
July 7, 2020, 9:11 p.m.
Very nice questions .