A copper wire of diameter 1.0 mm carries a current of 0.2 A. Copper has `8.4xx10^(28)` atoms per cubic metre. Find the drift velocity of electrons, assuming that one charge carrier of `1.6xx10^(-19)` C is associated with each atom of the copper.
Text Solution
AI Generated Solution
To find the drift velocity of electrons in a copper wire, we can use the formula:
\[ I = n \cdot e \cdot A \cdot v_d \]
where:
- \( I \) = current (in Amperes)
- \( n \) = number of charge carriers per unit volume (in m\(^{-3}\))
- \( e \) = charge of an electron (in Coulombs)
...
Topper's Solved these Questions
CURRENT ELECTRICITY
PRADEEP|Exercise Conceptual Problems|3 Videos
CURRENT ELECTRICITY
PRADEEP|Exercise Very short Q/A|7 Videos
COMMUNICATION SYSTEMS
PRADEEP|Exercise MODEL TEST PAPER-2|9 Videos
DUAL NATURE OF RADIATION AND MATTER
PRADEEP|Exercise Exercise|191 Videos
Similar Questions
Explore conceptually related problems
There is a copper wire of radius 1mm and it carries a current of 2 ampere, calculate the drift speed of electrons assuming there are 8.5 xx10^(28) free electrons per metre cube.
An aluminium wire of diameter 0.24 cm is connected in series to a copper wire of diameter 0.16 cm. The wires carry an electric current of 10 ampere. Find (i) current-density in the aluminium wire (ii) drift velocity of electrons in the copper wire. Given : Number of electrons per cubic metre volume of copper =8.4xx10^(28) .
The diameter of a copper wire is 2mm, if a steady current of 6.25 A is caused by 8.5xx10^(28) //m^(3) electrons flowing throught it. Calculate the drift velocity of condu ction electrons.
A copper wire has a square cross-section, 2.0 mm on a side. It carries a current of 8 A and the density of free electrons is 8 xx 10^(28)m^(-3) . The drift speed of electrons is equal to
An aluminium wire of diameter 2.5 mm is connectedf in series with a copper wire of diameter1.6 mm. A current of 2.0 A is passed through them. Find (a) current density in aluminium wire, (b) drift velocity of electrons in copper wire. Given the number density of conduction electrons in copper is 10^(29) m^(-3) .
A current of 1.6 A is passing through a copper voltameter . Find the number of Cu atoms of deposited on the cathode per minute . Given e = 1.6 xx 10^(-19) C .
A silver wire 1mm diameter carries a charge of 90 coulombs in 1 hours and 15 minutes. Silver contains 5.8xx10^(28) free electrons per cm^(3) find the current in wire and drift velocity of the electron.
There are 8.4xx10^(22) free electrons per cm^(3) in copper. The current in the wire is 0.21A (e= 1.6xx10^(-19)C ). Then the drifts velocity of electrns in a copper wire of 1mm^(2) cross section, will be:-
PRADEEP-CURRENT ELECTRICITY-Problems for Practice (B)
