JAMB Chemistry 2009 Objective — Question 9
Question 9 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2009 Objective paper, with the correct answer and a full explanation.
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Cathode rays cause an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays
- A. are positively charged
- B. are negatively charged
- C. have mass
- D. travel in straight linesCorrect
Explanation
This observation (the casting of a sharp shadow) buttresses the claim that cathode rays travel in straight lines.
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