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Dual nature of electron



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Q1. Calculate the kinetic energy of a photoelectron (in eV) emitted on shining light of wavelength 6.2 ? 10-6 m on a metal surface. The work function of the metal is 0.1 eV.

(a) 10 eV
(b) 0.1 eV
(c) 0.01 eV
(d) 1000 eV

Q2. For a photosensitive surface, the work function is 3.3 ? 10-19 J. Calculate the threshold frequency.

(a) 15 ? 1014 Hz
(b) 25 ? 1014 Hz
(c) 5 ? 1014 Hz
(d) 55 ? 1014 Hz

Q3. The stopping potential in an experiment on the photoelectric effect is 1.5 V. What is the maximum kinetic energy of the photoelectrons emitted?

(a) 1.5 eV
(b) 3 eV
(c) 4.5 eV
(d) 6 eV

Q4. The maximum kinetic energy of a photoelectron is 3 eV. What is the stopping potential?

(a) 0 V
(b) 3 V
(c) 9 V
(d) 12 V

Q5. The stopping potential in photoelectric emission does not depend upon the frequency of the incident radiation.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q6. If the intensity of the radiation incident on a photo-sensitive plate is doubled, how does the stopping potential change?

(a) Increases
(b) Decreases
(c) No effect
(d) Infinite

Q7. How does retarding potential vary with the frequency of light causing photoelectric effect?

(a) Infinite
(b) Zero
(c) Decreases
(d) Increases

Q8. If the frequency of the incident radiation is equal to the threshold frequency, what will be the value of the stopping potential?

(a) 0
(b) Infinite
(c) 180 V
(d) 1220 V

Q9. If the intensity of incident radiation in a photo-cell is increased, how does the stopping potential vary?

(a) Increases
(b) Remains the same
(c) Decreases
(d) Infinite

Q10. Two beams, one of red light and the other of blue light, of the same intensity are incident on a metallic surface to emit photoelectrons. Which emits electrons of greater frequency?

(a) Both
(b) Red light
(c) Blue light
(d) Neither


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E/m Ratio Was Determined By

Modified 241 Year Ago

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241 Year Ago

E/m Ratio Was Determined By

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Magnitude Of K.E. In An Orbit Is Caused By

Modified 241 Year Ago

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241 Year Ago

Magnitude Of K.E. In An Orbit Is Caused By

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341 views

The Minimum Real Charge On Any Particle Which Can Exist Is

Modified 241 Year Ago

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241 Year Ago

The Minimum Real Charge On Any Particle Which Can Exist Is

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Assertion : Cathode Rays Are A Stream Of α -particles. Reason : They Are Generated Under High Pressure And High Voltage.

Modified 241 Year Ago

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241 Year Ago

Assertion : Cathode Rays Are A Stream Of α -particles. Reason : They Are Generated Under High Pressure And High Voltage.

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322 views

The Average Distance Of An Electron In An Atom From Its Nucleus Is Of The Order Of

Modified 241 Year Ago

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241 Year Ago

The Average Distance Of An Electron In An Atom From Its Nucleus Is Of The Order Of

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Proton Was Discovered By

Modified 241 Year Ago Sangeeta

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Sangeeta
241 Year Ago

Proton Was Discovered By

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314 views

From The Following Masses, The One Which Is Expressed Nearest To The Milligram Is

Modified 241 Year Ago

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241 Year Ago

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