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  • Please help! The drift velocity of the electrons is v when current I is flowing through it .If both the radius and currents are doubled then drift velocity will be

The drift velocity of the electrons is v when current I is flowing through it .If both the radius and currents are doubled then drift velocity will be

  • Option 1)

    v/4

  • Option 2)

    2v

  • Option 3)

    v/2

  • Option 4)

    4v

 

Answers (1)

As we learnt

 

Vd is inversely proportional to I/A -

 

v_{d}  \alpha  \frac{1}{A}  :

Drift velocity varies inversly with area of cross-section .

- wherein

 

 Drift velocity is directly proportional to I and inversely proportional to A. here current become 2 times and area becomes 4 times, hence drift velocity become v/2.

 


Option 1)

v/4

Option 2)

2v

Option 3)

v/2

Option 4)

4v

Posted by

Vakul

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