The energy of a photon is given by E = hf. Find the dimension and unit of Plankโs constant h, where f is the frequency of radiation. (2076 โBโ)
What is the difference between accurate and precise measurements? (2076 โCโ, 2075 โAโ, 2074 โBโ, 2067)
In one of the printed documents the unit of universal gravitational constant is given as Nmkg-2. Check its correctness from dimensional analysis. (2075 โBโ)
Is dimensionally correct equation necessarily be a correct physical relation? What about dimensionally wrong equation? (2074 โSโ, 2066 โOldโ, 2063)
A student writes an expression for the momentum (p) of a body of mass (m) with total energy (E) and considering the duration of time (t) as p =[latex]\frac{2mE}{t}[/latex] . Check its correctness on dimensional analysis. (2073 โSโ)
Check dimensionally the correctness of the Stokeโs formula, F = 6 where symbols have their usual meanings. (2073 โCโ)
Check the correctness of the formula, PV = RT. (2072 โSโ)
The diameter of a steel rod is given as 56.47 0.02 mm. What does it mean? (2072 โCโ)
The length of rod is exactly 1 cm. An observer records the readings as 1.0 cm, 1.00 cm and 1.000 cm, which is the most accurate measurement? (2072 โDโ)
What do you mean by significant figure? (2071 โSโ)
A student writes an expression for the force causing a body of mass (m) to move in a circular motion with a velocity (v) as F = mv2. Use the dimensional method to check its correctness. (2071 โDโ)
Check the correctness of the relation h = where symbols have usual meaning. (2070 โSโ โ โBโ)
Name any two physical quantities which have the same dimensions. Can a quantity have unit but no dimension? Explain. (2070 โCโ)
If y = a + bt + ct2, where y is the distance and t is the time. What is the dimension and unit of c? (2070 โDโ)
Find the dimensions of Planckโs constant โhโ from the given equation: where is wavelength and p is the momentum of photon. (2069 โSโ)
What are the limitations of dimensional analysis? (2069 โAโ)
Check the correctness of the formula t = using dimensional analysis, t is the time period of simple pendulum, l is the length of simple pendulum and g is the acceleration due to gravity. (2069 โBโ)
The force F is given in terms of time โtโ and displacement โxโ by the equation F = AsinBx + CsinDt. What is the dimension of D/B? (2069 โOldโ โ โBโ)
Write dimensional formula of gravitational constant and latent heat. (2069 โOldโ, 2067 โSโ, 2056)
Check the correctness of formula t = where t be the time period, m is the mass and k is the force per unit displacement. (2064)
Derive the dimensional equation of Power. (2063 โSโ)
A student writes for escape velocity. Check the correctness of the formula by using dimensional analysis. (2062)
Convert 10 ergs in joules. (2061)
Check the correctness of the formula v2 = u2 + 2as using dimensional analysis.
Taking force, length and time to be fundamental quantities, find the dimensional formula for the density.
The escape velocity of a body is v = . Check the correctness of the formula using dimension.
The density of gold is 19.3 g/cc. Express its value in SI unit.
Obtain dimensions of specific heat capacity and gravitational constant.
