DPP – 11C26
De Broglie & Heisenberg Uncertainty Principle
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Q1. Calculate the mass of photon with Ξ» = 3.6 Γ .
(Ans :Β m = 6.1 Γ 10-29Β πΎπ )
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Q2. Calculate wavelength if kinetic energy is 3.0 Γ 10-25π½.
( Ans : π = 8967 Γ 10-9Β π )
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Q3. Two particle A & B are in motion. If wavelength of A is 5 Γ 10β8m. Find wavelength of B if the relation is πBΒ = Β½Β πA. (ππ΄ = ππππππ‘π’π ππ π΄, ππ΅ = ππππππ‘π’π ππ π΅)
( Ans : πBΒ = 10-7π)
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Q4. Calculate the De-Broglie wavelengthΒ of an electronΒ that has been acceleration through from Rest through a potential difference of 1 KV (1000 V).
(Ans :Β v = 1.88 Γ 107m/s, Ξ» = 3.87 Γ 10-11π)
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Q5. A microscope using suitable photons is employed to locate an π β in an atom with a distance of 0.1 Γ . Calculate the uncertainty in velocity.
(Ans : β³ Ξ½ = 5.79 Γ 106Β m/s)
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Q6. A golf ball has mass 40g & speed 45 m/s if speed can be measured within accuracy of 2%. Calculate uncertainty in position.
(Ans :Β β³π₯ = 1.46 Γ 10-33 m )
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Q7. Prove that πlectron Β can not exist inside the nucleus by the help of Heisenberg uncertainty principle.
(Ans :β³ Ξ½ = 5.77 Γ 1010 m/s , not possible )
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