” Measurements “involve the process of determining the size, quantity, or degree of something using standard units. They are essential in science, engineering, and daily life for accuracy and comparison.
Physics Class 11 Chapter 1 Notes
In printing we use colours which are in number: 4
The least count of meter rod is: 0. 1 cm
The absolute uncertainty of screw gauge is: 0.01 mm
Any measurement taken from an instrument will be more precise, if instrument has: small least count
There are four readings of a micrometer to measure the diameter of a wire in mm are 1.21, 1.23, 1.25, 1.23. The mean of deviations is: 0.01 mm
In addition and subtraction resultant uncertainty is obtained by: adding absolute uncertainties
Velocity of object has 2% uncertainty and mass has 1% uncertainty. Total % age uncertainty in K.E is: 5%
For total assessment of uncertainty in the final result obtained by multiplication and division: add percentage unccertainty
Length of a side of a cube is 20mm. Its volume is: 8cm3
The uncertainty in timing process can be determined by: dividing the L.C of timing device by number of vibrations
The percentage uncertainty in measurement of mass and velocity are 2% and 3%. The maximum uncertainty in the measurement of kinetic energy is: % age uncertainties are added
Physical quantity “pressure” is terms of base unit is: kg m–1 s–2
Dimension of frequency is same that of: angular velocity
Which pair has same unit: momentum and impulse
Mass is highly concentrated form of: Energy
The branch of physics which is concerned with ultimate particles of which matter is composed of: Particle physics
The dimension of power is: Ratio of dimension of power and work [power] : [work ]: 1: T
Relativistic mechanics was developed by: Einstein
Which of the given pairs not has same dimensions: power, energy
The dimension of mc2 is same as the dimension of: energy
In an equation, if the quantities on both sides are same, the irrespective of the form of the formula, then this is called: principle of homogeneity of dimension
Important : Review all previous years’ 11 Class Past Papers for comprehensive practice and better exam preparation.