MEDIUM
11th CBSE
IMPORTANT
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Which of the following time measuring devices is most precise?

Give reason for your answer.

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Important Questions on Units and Measurement

MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.27
The distance of galaxy is of the order of 1025 m. Calculate the order of magnitude of time taken by light to reach us from the galaxy.
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.28
The Vernier scale of travelling microscope has 50 divisions which coincide with 49 divisions of main scale divisions. If each main scale division is 0.5mm, calculate the minimum inaccuracy in measurement of distance.
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.29

During a total solar eclipse the moon almost covers the sphere of the sun. Write the relation between the distances and sizes of the sun and moon.

MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.30
If the unit of force is 100 N, unit of length is 10 m and unit of time is 100 s. What is the unit of mass in this system of units ?
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.31
Give an example of a physical quantity which has a unit but no dimensions.
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.31
Give an example of a physical quantity which has neither unit nor dimension.
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.31
Give an example of a constant which has a unit.
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 2 - Units and Measurement>SA>Q 2.31
Give an example of a constant which has no unit