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.

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Q. What is the necessity of selecting some units as fundamental units?

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Q. Define the S.I. unit of solid angle.

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Q. Define light year.

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Q. Define a parsec.

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Q. What is the largest practical unit of mass?

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Q. What is lunar month?

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Q. How many shakes are there in 1 second?

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Q. What is a leap year?

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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]

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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]

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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]

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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]

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Q. Give examples of three physical quantities which have the same dimensions.

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Sol. [esquestion] What is the unit of pressure if the unit of mass iskg, the unit of length is metre and the unit of time is minute?

Q. Convert into erg.

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Q. Calculate the value of force 100 dynes on a system based on a metre, kilogram and minute as fundamental units.

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Q. What is a null vector?

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Q. What are co-initial and collinear vectors?

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Q. What is the significance of null vector?

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Q. Can three unequal forces add upto zero?

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Q. Under what condition the directions of sum and difference of two vectors will be same?

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Q. Point out the essential condition for the addition of vectors.

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Q. What is the difference between and

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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]

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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]

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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]

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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]

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Q. Can you associate vectors with (i) length of a wirebent into a loop (ii) a plane area (iii) a sphere? [NCERT]

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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]

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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]

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• September 16, 2022 at 7:25 am

What is physics

• July 2, 2022 at 7:25 am

Thank you sir

• November 17, 2021 at 3:18 pm

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• May 1, 2021 at 7:18 am

It is not important for us

• April 6, 2021 at 2:27 pm

Tq but phisics has always doubt

• March 14, 2021 at 11:02 am

• September 8, 2022 at 9:54 pm

Thanku sir

• March 9, 2021 at 6:07 pm

What is physics

• September 28, 2021 at 4:05 pm

Branch of science that deals with nature and natural phenomena is called physics

• February 18, 2021 at 9:35 pm

Tq for helping

• December 30, 2020 at 7:45 pm

Thanks a lot

• April 6, 2021 at 2:28 pm

Really

• December 6, 2020 at 2:19 pm

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• February 6, 2021 at 6:43 am

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• November 19, 2020 at 5:13 pm

• December 30, 2020 at 7:46 pm

Sorry

• October 24, 2020 at 10:21 am

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• October 24, 2020 at 10:22 am

Yes it’s true
I also can’t see it .

• November 17, 2020 at 7:59 am

very good question

• October 16, 2020 at 8:20 am

Thank you so much

• October 25, 2020 at 12:17 pm

Top classs

• October 12, 2020 at 12:48 pm

I can’t see the answer to this. Where i can see the answers of this question

• July 27, 2021 at 11:38 am

Just click on show solutions

• October 12, 2020 at 12:47 pm

I can’t see the answer to this.

• October 10, 2020 at 9:25 am

thank you so much

• October 7, 2020 at 12:03 pm

Deafine physical quantity and explane it’s type

• October 2, 2020 at 11:48 am

Thanks

• October 13, 2020 at 4:29 pm

foot

• October 1, 2020 at 9:25 am

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• October 1, 2020 at 6:57 am

Thanks a lot

• December 30, 2020 at 7:43 pm

Meenakshi aano?

• September 19, 2020 at 8:49 pm

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• September 14, 2020 at 11:15 am

• September 9, 2020 at 7:41 pm

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• September 6, 2020 at 7:53 pm

Good question

• August 21, 2020 at 10:29 pm

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🙏🙏

• July 17, 2020 at 10:15 am

very very nice and helpful questions.
thankyou

• July 7, 2020 at 9:11 pm

Very nice questions .