Dual Nature of Radiation and Matter - Result Question 17
18. Which one of the following statements is not true for cathode rays?
[2002]
(a) Cathode rays produce heat when incident on metals
(b) Cathode rays travel in a straight line
(c) Cathode rays do not deflect in electric field
(d) Cathode rays produce fluorescence when they fall on certain meterials
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Answer:
Correct Answer: 18. (c)
Solution:
- (c) Cathode rays are negatively charged rays. Hence, when electric field is applied to them, then they deflect in direction opposite to electric field.
