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Class 11 Physics

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Units and Measurement

What a measurement is, how precise it can claim to be, and the dimensions beneath the units 5 sessions · Class 11 Physics · Units & measurement

1.1 Measuring, and the SI system A measurement is a number and a unit. Seven SI base units define every other unit in physics. 1.2 Significant figures The significant figures of a measurement are the reliable digits plus one estimated digit. 1.3 Rounding through a calculation Products keep the fewest significant figures; sums keep the fewest decimal places. 1.4 Dimensions of physical quantities The dimensions of a quantity state which base quantities it is made from, and with what powers. 1.5 Dimensional analysis If two sides of an equation have different dimensions, it is wrong. A match does not prove it right.

5 sessions published so far for Class 11 Physics.