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考生注意: 1.全卷共七大题,在120分钟内完成。 2.第五、大、七题要求写出必要的文字说明、方程式和重要的演算步骤。只写出最后答案,而未写出主要演算过程的,不能得分。有数字计算的问题,答案中必须明确写出数值和单位。一、(32分)每小题4分。每小题只有一个正确答案,把正确答案前面的字母填写在题后的方括号内。选对得4分,选错的或不答的,得0分;选了两个或两个以上的,得0分。填写在方括号外的宇母,不作为选出的答案。 (1)关于光电效应的下述说法中,正确的是 (A)光电子的最大初动能随着入射光强度的增大而增大。 (B)只要入射光的强度足够大或照射的时间足够长,就一定能产生光电效应。
Candidates’ attention: 1. A total of seven questions in the full volume, completed in 120 minutes. 2. The fifth, seventh, and seventh questions require the writing of necessary text descriptions, equations, and important calculation steps. Only write the final answer, but did not write the main calculation process, can not score. There are problems with numerical calculations, and the answers must be clearly written in numerical values and units. One (32 points) 4 points for each question. There is only one correct answer for each question. Fill in the letters preceding the correct answer in square brackets after the question. You get 4 points for the match, 0 points for the wrong choice or not, and 0 points for two or more choices. Umu, who is outside the square brackets, is not considered as the selected answer. (1) The following statement about the photoelectric effect is correct. (A) The maximum initial kinetic energy of photoelectrons increases with the intensity of incident light. (B) As long as the intensity of the incident light is sufficiently large or the irradiation time is long enough, the photoelectric effect can be generated.