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The electric current in a discharge tube...

The electric current in a discharge tube containing a gas is due to

A

electron only

B

positive ions only

C

negative ion and positive ions both

D

electrons and positive ions both

Text Solution

Verified by Experts

The correct Answer is:
D
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MOTION-CURRENT ELECTRICITY-EXERCISE -1 (OBJECTIVE PROBLEMS NEET)
  1. Current in a conductor is due to

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  2. The electric current in a liquid is due to the flow of

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  3. The electric current in a discharge tube containing a gas is due to

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  4. A steady current is passing through a linear conductor of non-uniform ...

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  5. A current I flows through a uniform wire of diameter d when the mean e...

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  6. A wire of non-uniform cross-section is carrying a steady current. Alon...

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  7. When a potential difference (V) is applied across a conductor, the the...

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  8. A steady current is passing through a linear conductor of non-uniform ...

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  9. A metallic block has no potential difference applid across it, then th...

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  10. A cross–sectional area of a copper wire is 3xx10^(–6) m^2. The current...

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  11. Two wires each of radius of cross section r but of different materials...

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  12. In a wire of cross-section radius r, free electrons travel with drift ...

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  13. An insulating pipe of cross-section area A contains an electrolyte whi...

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  14. A uniform copper wire carries a current i amperes and has p carries pe...

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  15. In the presence of an applied electric field (vecE) in a metallic con...

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  16. A wire has non-uniform cross-section as shown in fig. steady current f...

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  17. Specific resistance of a wire depends on its

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  18. If the electrical resistance of a typical substance suddenly drops to ...

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  19. The resistance of wire is 20 Omega. The wire is stretched to three tim...

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  20. The dimensions of a mangnin block are 1 cm xx 1 cm xx100 cm The electr...

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