Photoelectric Effect Questions and Answers

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State any two factors that affect photoelectric effect.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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What is meant by the term ‘photoelectric effect?’

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The figure below shows a circuit diagram for a photocell.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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State two factors that determine the speed of electrons emitted from a metal surface by light energy falling on it.

asked Jul 14, 2021 in Physics Form 4 by anony mous

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An X-ray operates at 30000V and the current through it is 2mA. Given that the charge of an electron is 1.6 x 10-19C, h = 6.63 x 10-34JS, speed of light, C = 3.0 x 108m/s, calculate:-

asked Jul 8, 2021 in Physics Form 4 by anonymous

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State two advantages of using a Cathode Ray Oscilloscope (C.R.O) as a voltmeter over the ordinary voltmeter.

asked Jul 8, 2021 in Physics Form 4 by anonymous

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Sodium has a work function of 2.3eV. Given that: Planck’s constant h = 6.63 x 10-34JS, velocity of light in vacuum, C = 3.0 x 108m/s, 1 electron-volt (1eV) = 1.6 x 10-19 C and mass of an electron, me = 9.1 x 10-31kg, calculate:

asked Jul 8, 2021 in Physics Form 4 by anonymous

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State one factor which affects the rate of each of the above types of emission.

asked Jul 8, 2021 in Physics Form 4 by anonymous

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Distinguish between thermionic emission and photoelectric emission.

asked Jul 8, 2021 in Physics Form 4 by anonymous

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Figure 6 shows a graph of stopping potential against the frequency for a certain photo emissive surface, drawn by a student from the data collected when carrying out an experiment on photoelectric effect.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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