Discuss in detail different types of errors arising in the measurement of the physical quantities. State the general method for estimating the error in a combined caldculation.

What are different types of errors measurements made by instruments?

Comment on statement : "To define a physical quantity for which no method of measurment is given or known has no meaning."

If a physical quntity is P = (a^3 b^2)/c and the percentage errors in the measurement of a,b and c are 1%,2% and 3% respectively.Find the maximum percentage error in the measurement of physical quantity P.

A physical quantity X is related to four measurable quantities a, b, c and d as follows. X = a^2 b^3 c^(5//2) d^-2 The percentage error in the measurement of a,b,c and d are 1%,2%, 3% and 4%, respectively. What is the perecentage error in quantity X? If the value of X calculated on the bais of the above relation is 2.7 63, to what value should you round off the result?

Precise measurements of physical quantities are a need of science. For example, to ascertain the speed of an aircraft, one must have an accurate method to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. Think of different examples in modern science where precise measurements of length, time, mass etc. are needed. Also, wherever you can, give a quantitative idea of the precision needed.

Given below is some famous number associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which this number belongs. 14.4 keV [energy of a particular transition in "^57Fe nucleus associated with a famous high resolution spectroscopic method (Mossbauer spectroscopy)].

If P,Q,R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?