Home
Class 12
PHYSICS
A current of 5 A passss through a copper...

A current of 5 A passss through a copper conductor (resistivity = `1.7 xx 10^(-8) Omega m`) of radius of cross -section 5mm. Find the mobility of the charges if their drift velocity is `1.1 xx 10^(-3) m//s`.

A

`1.0 m^2//vs`

B

`1.2 m^2//vs`

C

`1.5 m^2//vs`

D

`1.8 m^2//vs`

Text Solution

Verified by Experts

J= Current density `=E/p` (E= electric field, p=resistive)
`implies E=p.I/A` (I=current) `because` drift velocity `=v_d=mu E`
`implies mu=m obility =V_d/E=(V_dA)/(pI)=(1.1 times 10^-3 times pi times 25 times 10^-6)/(1.7 times 10^-8 times 5) approx 10.15 times 10^-1=1.015m^2//vs`
Promotional Banner

Similar Questions

Explore conceptually related problems

[" A current of "5" Apasses through a "],[" copper conductor (resistivity "],[=1.7times10^(-8)Omega-m" ) of radius of "],[" cross-section "5mm" .Find the "],[" mobility of the charges,if their drift "],[" velocity is "1.1times10^(-3)m/s],[" (A) "1.5m^(2)/V-s],[" (B) "1.3m^(2)/V-s],[" (C) "1.0m^(2)/V-s],[" (D) "1.8m^(2)/V-s]

A copper wire of cross sectional area 2.0 mm^(2) , resistivity =1.7xx10^(-8)Omegam , carries a current of 1 A. The electric field in the copper wire is

A current of 5 A is passing through a metallic wire of cross-section area 4 xx 10^-6 m^2 . If the density of the charge carries in the wire is 5 xx 10^36 //m^3 , the drift velocity of the electrons is.

If resistivity of copper conductor is 1.7xx10^(-8) Omega -m and electric field is 100Vm^(-1) , then current density will be

A current of 16 A is made to pass through a conductor in which the number of density of free electrons is 4xx10^(28)m^(-3) and its area of cross section is 10^(-5)m^(2) . The average drift cross section is 10^(-5)m^(2) . The average drift velocity of free electrons in the conductor is

A conductor has a cross-section of 15 mm^(2) and resistivity of 7.6 xx 10^(-8)Omega m at 0^@C . If the temperature coefficient of resistance of the material of the conductor is 5 xx 10^(-3).^(@)C^(-1) , calculate its resistance for 2 km length of conductor when its temperature is 60^@C .

A current of 1.8 A flows through a wire of cross-sectional area 0.5 mm^(2) ? Find the current density in the wire. If the number density of conduction electrons in the wire is 8.8 xx 10^(28) m^(-3) , find the drift speed of electrons.