K.C.S.E Physics Q & A - MODEL 2009PP2QN18
​(a) It is observed that when ultra- violet radiation is directed onto a clean zinc plate connected to the cap of a negatively charged leaf electroscope, the leaf falls
(i) Explain this observation (ii) State why this observation does not occur if the electroscope is positively Charged (iii) Explain why the leaf of the electroscope does not fall when infra- red radiation is directed onto the zinc plate (b) State the effect on the electrons emitted by the photoelectric effect when:
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M.A NyamotiMy passion is to see students pass using right methods and locally available resources. My emphasis is STEM courses
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