Question : The unit of Planck's Constant is:
Option 1: Js
Option 2: Js-2
Option 3: J/s
Option 4: Js2
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Correct Answer: Js
Solution : The correct answer is Js.
Planck's Constant is defined as the ratio of the energy of a quantum of electromagnetic radiation to the frequency. The unit of Planck's Constant is Joule-second (Js). The unit of energy is Joule, and the SI unit of frequency is per second. The value of the Planck constant is 6.62607015×10−34 joule-second.
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Question : Planck's Constant has the dimensions of:
Option 1: Energy
Option 2: Linear momentum
Option 3: Angular momentum
Option 4: Force
Question : The correct electronic configuration of Cu is:
Option 1: [Ar]3 d9 4 s2
Option 2: [Kr]3 d9 s2
Option 3: [Kr]3 d10 s1
Option 4: [Ar]3 d10 4 s1
Question : What is the unit of relative density?
Option 1: kg/m
Option 2: kg/m2
Option 3: kg/m3
Option 4: It has no unit
Question : The dimensional formula for universal gravitational constant is
Option 1: M-1L3T2
Option 2: ML2T-2
Option 3: M-2
Option 4: M-1L3T-2
Question : Which of the following laws, represented by the formula T2/R3, compares the orbital period and radius of the orbit of a planet with that of other planets?
Option 1: Hubble's Law
Option 2: Copernicus's Law
Option 3: Kepler's Third Law
Option 4: Bragg's Law
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