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12th Odisha Board
IMPORTANT
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Photoelectric effect supports:

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Important Questions on Atomic Physics

HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 16
A radio transmitter operates at a frequency 0f 880 kHz and a power of 10 kW. The number of photons emitted per second are :
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 17
In order to increase the kinetic energy of the emitted photoelectrons, there should be an increase in:
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 18
The work function of tungsten and sodium are 4.4 eV and 2.3 eV respectively. If the threshold wavelength of sodium is 5460°A, then the threshold wavelength of tungsten is:
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 19
The Light of the frequency of 1.5 times the threshold frequency is incident on a photosensitive material. If the frequency is halved and the intensity is doubled, the photo current becomes:
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 20
A quanta will have more energy if:
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 21
The threshold frequency of potassium is 3×1014 Hz. The work function is:
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 22
Light of wavelength of 4000°A is incident on a metal plate whose work function is 2eV. The maximum kinetic energy of the emitted photoelectrons would be:
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 16 - Atomic Physics>MODEL QUESTIONS>Q 23
Matter waves: