Current Electricity - Result Question 15
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16. The resistance of a discharge tube is
======= ####16. The resistance of a discharge tube is
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/current-electricity/current-electricity—result-question-15.md (a) zero
(b) ohmic
(c) non-ohmic
(d) infinity
[1999]
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Answer:
Correct Answer: 16. (c)
Solution:
- (c) In discharge tube the current is due to flow of positive ions and electrons. Moreover, secondary emission of electrons is also possible. So V-I curve is non-linear; hence resistance is non-ohmic.
