Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 52

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Light of wavelength $λ$ falls on a metal having work function $\frac{hc}{λ_{\circ}}$ . The photoelectric effect takes place when

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Important Questions on Structure of Atom

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 53

Cu

metal (work function

= 4.8 eV

) can show photoelectric effect when the wavelength of the photon is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 54

What is the maximum kinetic energy of photoelectron from a photon of wavelength

2000 \overset{\circ}{A}

of

Cu

metal (work function of

Cu

is

4.8 eV

)?

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 55

When the frequency of light incident on a metallic plate is doubled, the maximum

KE

of the emitted photoelectrons is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 56

The number of photoelectrons emitted depends upon

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 57

The expression for Bohr's radius of an atom is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 58

The ratio of radii of the second and first Bohr's orbits of

H -

atom is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 59

The ratio of radii of the second orbits of

{He}^{+}, {Li}^{2 +}

and

{Be}^{3 +}

is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 1>Q 60

If

r

is the radius of the first orbit, the radius of

n^{th}

orbit of

H -

atom is given by