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Hydrogen Atom and Bohr Theory MCQs for Competitive Exams

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Hydrogen Atom and Bohr Theory MCQs for Competitive Exams

Practice with answers, explanations, and exam-focused revision notes.

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Topic Notes: Hydrogen Atom and Bohr Theory

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Hydrogen Atom and Bohr Theory MCQs in Physics are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

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11
What is the sign of the total energy of an electron in a stable orbit of a hydrogen atom?
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12
Which chemical element consists of the simplest atom, containing only a single proton in its nucleus?
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13
Which electron transition in a hydrogen atom necessitates the absorption of a photon with the highest frequency?
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14
What is the approximate magnitude of the electric field experienced by an electron in a hydrogen atom due to the nucleus?
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15
What is the energy level of an electron in the 4th orbit of a hydrogen atom?
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16
What is the fundamental mechanism for generating ultraviolet radiation in a gas discharge?
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17
What is the typical lifetime of an atom in an excited state before it returns to the ground state?
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18
What is the approximate order of magnitude for the diameter of an atom?
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19
Which physicist provided the first theoretical explanation for the hydrogen spectrum?
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20
What are the fundamental assumptions underlying Bohr's model of the atom?
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