Home
Class 12
PHYSICS
When the current i is flowing through a ...

When the current i is flowing through a conductor, the drift velocity is v . If 2i current is flowed through the same metal but having double the area of cross-section, then the drift velocity will be

A

`v\4`

B

`v//2`

C

`v`

D

`4v`

Text Solution

Verified by Experts

The correct Answer is:
C
`v_(d) = (J)/("ne") rArr v_(d) prop J` [current density]
`J_1= (i) /( A) and j_(2)= (2i) / (2 A) = ( 1) /( A) J_(1) ,`
`therefore ( v_(d))_1 = (v_d)_2=v`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    DISHA PUBLICATION|Exercise EXERCISE-1 Concept Builder (Topicwise) Topic 2: Resistance, Conductance and Resistivity|14 Videos

  • CURRENT ELECTRICITY

    DISHA PUBLICATION|Exercise EXERCISE-1 Concept Builder (Topicwise) Topic 3: Combination of Resistors|10 Videos

  • CURRENT ELECTRICITY

    DISHA PUBLICATION|Exercise EXERCISE-2 Concept Applicator|23 Videos

  • CONCEPT BUILDER

    DISHA PUBLICATION|Exercise Exercise-2 Concept Applicator|27 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    DISHA PUBLICATION|Exercise EXERCISE -2 : CONCEPT ALLPLICATOR|30 Videos

Similar Questions

Explore conceptually related problems

When a current flows through a conductor its temperature

When current flows through a conductor, then the order of drift velocity of electrons will be

When a current "i" flows through a wire,the drift velocity of electrons is "v_(d)" .When current "2" i flow through the another wire of same material having double length and same area of cross section and temperature,the drift velocity of the elections will be

When current is 4 A in a conductor the drift velocity is v_(d) When the current is 3 A the drift velocity will be

Current I is flowing through a copper wire of radius r with drift velocity of electorns v_(d) . If this current is passed through another copper wire of same length and double the raduis, what will be the drift velocity of free electrons in it?

The water flowing through the same tube having two different cross section areas has different flow rates .

When a current flows in a conductor, the order of magnitude of drift velocity of electrons through it is :

When a current I is set up in a wire of radius r, the drift velocity is v_(d) . If the same current is set up through a wire of radius 2r, the drift speed will be

A stready current i is flowing through a conductor of uniform cross-section. Any segment of the conductor has