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Orbital speed of the electron in different Bohr orbits

This type of question, asked 6 times: 9 May 2023 S2, 11 May 2023 S2, 10 May 2024 S2, 11 May 2024 S1, 25 Apr 2025 S2, 14 May 2026 S2. All 6 questions below, oldest first.

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  1. Question 1

    9 May 2023 S2

    27
    In hydrogen atom, if VnV_n and VpV_p are orbital velocities in nnth and ppth orbit respectively, then the ratio Vp:VnV_p : V_n is

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  2. Question 2

    11 May 2023 S2

    18
    In a hydrogen atom in its ground state, the first Bohr orbit has radius r1r_1. The electron's orbital speed becomes one-third when the atom is raised to one of its excited states. The radius of the orbit in that excited state is

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  3. Question 3

    10 May 2024 S2

    13
    The ratio of the velocity of the electron in the first Bohr orbit to that in the second Bohr orbit of hydrogen atom is

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  4. Question 4

    11 May 2024 S1

    21
    An electron in the hydrogen atom jumps from the first excited state to the ground state. What will be the percentage change in the speed of electron?

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  5. Question 5

    25 Apr 2025 S2

    40
    In hydrogen atom in its ground state, the first Bohr orbit has radius ' r1r_{1} '. When the atom is raised to one of its excited states, the electrons orbital velocity becomes one-third. The radius of that orbit is

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  6. Question 6

    14 May 2026 S2

    147
    In hydrogen atom, an electron jumps from higher orbit to lower orbit so that radius of the lower orbit is (14)th\left(\dfrac{1}{4}\right)^{th} of radius of higher orbit. If speed of electron in higher orbit was V, then speed in lower orbit is

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