Unit dimension measurement

Significant figure: Significant figure are the number of digits upto which the accuracy is maintain. Rules of significant figure: (i) All non-zero digits are significant. For example, 1.235 has four significant figures. (ii) The zeros appearing between two non-zero digits are significant. For example, 4.025 has four significant figures. (iii) All the trailing zeros after […]

Accuracy precision and error measurement: Error: There is a difference between the true value and measured value when a physical quantity is measured by an instrument as the measuring instrument is not ideal. This difference is known as error. Accuracy: Accuracy of the measurement of a physical quantity is the closeness of the measured value

Vernier calipers: Vernier calipers is used to measure length of a body. It consists of four parts. (i) Main scale: It consists of a steel metallic strip (M) graduated in centimetre and millimetre in one edge and in inches in other edge. (ii) Vernier scale. A vernier scale (V) slides on the strip M is

Measurement: 1. Parallax method: If you hold a pen in front of your eye and look the tip of the pen by closing the right eye and then the left eye keeping right eye open, you observe that the position of the tip of the pen changes. This relative shift of the tip of the

Dimension: All the physical quantities are derived from some fundamental quantities. Any physical quantity is expressed in terms of the product of different powers of the fundamental quantities. The exponent of fundamental quantities that represents the expression is called the dimension of that physical quantity. Consider a physical quantity speed = =  = length (time)-1