Current Electricity - Result Question 15
16. The resistance of a discharge tube is
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======= ####16. The resistance of a discharge tube is
c3eec34ec6b1fad69db54a20ad4b2dca40c2aa54 (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.
