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Mobility of free electrons in a conducto...

Mobility of free electrons in a conductor is 

A

directly proportional to electron density

B

directly proportional to relaxation time

C

inversely proportional to electron density

D

inversely proportional to relaxation time

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - IA
  1. In the presence of an applied electric field (vecE) in a metallic cond...

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  2. The paths of electrons between successive collisions (with the positiv...

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  3. Mobility of free electrons in a conductor is

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  4. The mobility of free electrons (charge e, mass m and relaxation time t...

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  5. Ohm's law is applicable to

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  6. Ohm's law is not applicable for

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  7. The electric intensity E, current density j and conductivity sigma are...

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  8. The formula V =IR is applicable to

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  9. Which of the following wiring diagrams could be used to experimentally...

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  10. The resistance of a conductor is

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  11. On increasing the temperature of a conductor, its resistance increases...

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  12. With the increase of temperature, the ratio of conductivity to resisti...

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  13. The temperature coefficient of resistance of conductors is

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  14. The best material for making resistances in resistance box

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  15. The product of resistivity and conductivity of a cylindrical conductor...

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  16. Wires of Nichrome and Copper of equal dimensions are connected in seri...

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  17. Resistivity of a conductor depends upon

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  18. With the increase of temperature, the specific resistance of metal

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  19. At absolute zero silver wire behaves as

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  20. Material used for heating coils is

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