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Current in a conductor is due to...

Current in a conductor is due to

A

motion of free electrons in it

B

motion of (+) ve ions

C

free electrons and holes

D

protons

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The correct Answer is:
A
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MOTION-CURRENT ELECTRICITY-EXERCISE -1 (OBJECTIVE PROBLEMS NEET)
  1. A current of 5Amp. exist on a 10 ohm resistance for 4min. How much cha...

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  2. Current in a conductor is due to

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  18. Specific resistance of a wire depends on its

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

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

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