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Heisenberg Uncertainty Principle - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main

Syllabus

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Heisenberg’s uncertainty principle is considered one of the most asked concept.
4 Questions around this concept.

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In an atom, an electron is moving with a speed of 600 m/s with an uncertainty of 0.005%. Uncertainty with which the position of the electron can be located is X m. The value of X is

$\left ( h=6.6\times 10^{-34}kg\: m^{2}\: s^{-1},mass \: of\: electron, e_{m}=9.1\times 10^{-31}kg \right )$

0.000152

0.0051

0.00192

0.00384

View Solution

Given below are two statements:
Statement I : According to Bohr's model of hydrogen atom, the angular momentum of an electron in a given stationary state is quantised.
Statement II: The concept of an electron in Bohr's orbit. violates the Heisenberg uncertainty principle. In the light of the above statements, choose the most appropriate answer from the options given below.

Statement I is correct but Statement II is incorrect

Both Statement I and Statement II are incorrect

Statement I is incorrect but Statement II is correct

Both Statement I and Statement II are correct

View Solution

Concepts Covered - 1

Heisenberg’s uncertainty principle

Heisenberg’s uncertainty principle:

It states that it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron.

If an attempt is made to ensure that any one of these two quantities are measured with a higher accuracy, then the other quantity becomes less accurate.

Mathematically, the product of uncertainty in position(Δx) and uncertainty in momentum(ΔP) is equal to or greater than h/4π

$\Delta x .\Delta P\geq \frac{h}{4\pi}$

It can be proved mathematically that the uncertainty principle is only significant to subatomic particles but not insignificant for everyday large sized objects.

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Heisenberg’s uncertainty principle

Study other Related Concepts

Heisenberg Uncertainty Principle Current Topic

Thomson atomic model

Rutherford atomic model and its limitations

Atomic Number(Z), Mass number(A), Isotopes and Isobars

Electromagnetic radiation

Planck's quantum theory

Photoelectric effect

Hydrogen Spectrum

Bohr's Model Of An Atom

Zeeman and Stark's effect.

De Broglie Relationship

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