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Light Emitting Diode

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Question

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The minimum frequency of incident radiation to produce photoelectric effect is called ___________

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Solution

Threshold or cutoff Frequency

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Q. Fill in the blanks with suitable answer
The energy of a photon is given by the formula _____________

Q. What is photoelectric effect? Explain the effect of increase (i) frequency (ii) intensity of incident radiation on photoelectric current with suitable graphs.

In photoelectric effect, electrons are emitted

(1) At a rate that is independent of emitter.

(2) At a rate that is proportional to the square of amplitude of incident radiation

(3) With a maximum velocity proportional to the frequency of incident radiation

(4) Only if frequency of the incident radiation is above a threshold value

Note: Please explain all the options...

Q. In a photoelectric effect experiment, if 'f' is the frequency of incident radiation on the metal surface and 'I' is the intensity of the incident radiation, then

Q. In a photoelectric-effect experiment, if ‘f’ is the frequency of incident radiation on the metal surface and I is the intensity of the incident radiation, then

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Light Emitting Diode

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