Physics Class 11 | units and measurement @ jain tutor #shorts

Physical Properties And Their Measurement

Physical properties can be measured

A : When we change the unit of a measurement of a quantity, its numerical value changes. R : The product of numerical value of the physical quantity and unit for a quantity remain constant.

Explain the need for measurement in physics.

$ Protoplasm is the physical basis of a cell. ! Angstrom is a unit of measurements of electron microscopy.

Assertion : A physical quantity which has zero dimension may have unit of measurement. Reason : Two physical entities having same dimensional formula may have different units of measurement.

Class 12 Physics | Chapter 11 Dual Nature of Radiation and Matter| Important Questions and Quick Revision

A physical quantity is measured and the result is expressed as nu where u is the unit used and n is the numberical value. If the result is expressed in various units then

There are 20 students in a chemistry class and 30 students in a physics class. If ten students are to be enrolled in both the courses, then the number of students which are either in physics class or chemistry class is