WAEC Physics 2011 Theory — Question 35
Question 35 of 39 from the West African Examinations Council (WAEC) Physics 2011 Theory paper, with the correct answer and a full explanation.
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15(a)(ii) Explain the term stopping potential.
Model answer
The stopping potential is the potential difference of the anode of a photocell with respect to the cathode at which no electrons will reach the anode. In other words, it is the p.d across the plates that is required to stop the most energetic (fastest) photoelectron.
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