What is measurement of a physical quantity?

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.

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 do you meant by a physical quantity?

Which of the following is not the name of a physical quantity ?

Define volt and it is unit of which physical quantity?

What do you mean by dimensions of a physical quantity ? Give examples to show how the dimensions of a physical quantity are determined.