Solve Study Textbooks Guides

Join / Login

>>Class 12
>>Physics
>>Current Electricity
>>Drift Velocity & Mobility
>> $Two wires A and B of the same material,$

Question

Two wires $A$ and $B$ of the same material, having radii in the ratio $1 : 2$ and carry currents in the ratio $4 : 1$ . The ratio of drift speed of electrons in $A$ and $B$ is

A

$16 : 1$

B

$1 : 16$

C

$1 : 4$

D

$4 : 1$

Medium

Open in App

Solution

Verified by Toppr

Correct option is A)

Current flowing through the conductor, $I = n e v A$ .
Hence
$\frac{4}{1} = \frac{n e v _{d_{1}} π ( 1 ) ^{2}}{n e v _{d_{2}} ( 2 ) ^{2}}$
or

$\frac{v _{d_{1}}}{v _{d_{2}}} = \frac{4 \times 4}{1} = \frac{1 6}{1}$
Hence correct answer is option A.

Solve any question of Current Electricity with:-

Patterns of problems

Patterns of problems

Was this answer helpful?

0

0

Similar questions

Two wires each of radius of cross section $r$ but of different materials are connected together end to end (i.e., in series). If the densities of charge carriers in the two wires are in the ratio $2 : 3$ , the drift velocity of electrons in the two wires will be in the ratio of

Two wires each of radius of cross section $r$ but of different materials are connected together end to end (in series). If the densities of charge carriers in the two wires are in the ration $1 : 4$ , the drift velocity of electrons in the two wires will be in the ratio:

The drift speed of the conduction electrons is :

Two wires of the same material but of different diameters carry the same current I. If the ratio of their diameters is 1 : 2, then the corresponding ratio of their mean drift velocities will be

A conductor has a non-uniform section as shown in the figure. A steady current is flowing through it. Then the drift speed of the electrons:

475567

View more

More From Chapter

Current Electricity

View chapter >

Revise with Concepts

Advanced Knowledge of Drift Velocity

ExampleDefinitionsFormulaes

Interpretation of Current from Drift Velocity

ExampleDefinitionsFormulaes

Mobility

ExampleDefinitionsFormulaes

Learn with Videos

Mean Free Path of Electrons

Electron Mobility

Shortcuts & Tips

Memorization tricks

Memorization tricks

Common Misconceptions

Common Misconceptions

Cheatsheets

Problem solving tips

Problem solving tips

Mindmap

Important Diagrams

Important Diagrams

Practice more questions

Medium Questions