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Here is a physics sample paper that shows how we assisted a client in solving an electrostatics quiz.

Top-shelf Essays Physics Sample Paper Q&A

  1. During Einstein’s Photoelectric Experiment, what changes are observed when the frequency of the incident radiation is increased?
    a) The value of saturation current increases
    b) No effect
    c) The value of stopping potential increases
    d) The value of stopping potential decreases

Explain your answer

  1. How does the intensity affect the photoelectric current?
    a) As intensity increases, the photoelectric effect increases
    b) As the intensity increases, the photoelectric effect decreases
    c) As the intensity decreases, the photoelectric effect becomes twice
    d) No effect

Explain your answer

  1. The photoelectric emission could be explained by the ____________
    a) Wave nature of light
    b) Particle nature of light
    c) Dual nature of light
    d) Quantum nature

Explain your answer

  1. What is the effect of intensity on the stopping potential?
    a) As intensity increases, stopping potential increases linearly
    b) As intensity increases, stopping potential decreases linearly
    c) As intensity decreases, stopping potential increases exponentially
    d) No effect

Explain your answer

  1. On which part of the photoelectric cell does the radiation strikes?
    a) Cathode
    b) Anode
    c) Ammeter
    d) Radiation does not strike on the photoelectric cell

Explain your answer

Solutions

1   Answer: A — the value of saturation current increases.

Explanation: An increase in frequency means increase in energy possessed by these particles hence more particles are discharged thus current is increase.

2  Answer: A–  as intensity increases photoelectric   current  increases.

Explanation: An increase is intensity, causes a large number of electrons to be ejected hence causing an increase in current .

3  Answer: B– particle nature of light

Explanation: This is because the emission of free electrons from a metal surface is shown in the effect,hence showing that light is made up of packets or quantums of energy.

4  Answer: D–no effect

Explanation: stooping potential depends on kinetic energy which is only affected by frequency. E=hf

5 Answer: A–cathode

Explanation: This is because the cathode is a photosensitive plate.

 

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