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Home/chapter 1. units and measurements

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alok12
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alok12
Asked: January 6, 2025In: Class-11-Physics

How many significant figures are in the number 0.00230?

Significant figures represent the precision of a measured quantity, including all digits except leading zeros.

chapter 1. units and measurementsclass 11th physicsclass 11th scienceexercise questionncert solutionshort answer
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alok12
alok12
Asked: January 6, 2025In: Class-11-Physics

Which among the following is a derived unit in the SI system?

Derived units are formed by combinations of the seven base units in the SI system.

chapter 1. units and measurementsclass 11th physicsclass 11th scienceexercise questionncert solutionshort answer
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alok12
alok12
Asked: January 6, 2025In: Class-11-Physics

What is the SI unit of luminous intensity?

The SI unit system provides a standard for measuring all physical quantities, including the seven fundamental quantities.

chapter 1. units and measurementsclass 11th physicsclass 11th scienceexercise questionncert solutionshort answer
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alok12
alok12
Asked: January 6, 2025In: Class-11-Physics

In the measurement of a physical quantity, random errors can be reduced by:

Errors in measurements occur due to various reasons, including random and systematic errors. Reducing random errors improves accuracy.

chapter 1. units and measurementsclass 11th physicsclass 11th scienceexercise questionncert solutionshort answer
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alok12
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alok12
Asked: January 6, 2025In: Class-11-Physics

Which of the following is not a fundamental quantity?

Fundamental quantities are independent and form the base of derived physical quantities. Examples include length, mass, and time.

chapter 1. units and measurementsclass 11th physicsclass 11th scienceexercise questionncert solutionshort answer
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