When 115V is applied across a wire that is 10m long and has a 0.30mm radius, the current density is `1.4xx10^(4) A//m^(2)`. The resistivity of the wir

Question

When 115V is applied across a wire that is 10m long and has a 0.30mm radius, the current density is `1.4xx10^(4) A//m^(2)`. The resistivity of the wir

When 115V is applied across a wire that is 10m long and has a 0.30mm radius, the current density is `1.4xx10^(4) A//m^(2)`. The resistivity of the wire is
A. `2.0xx10^(-4)Omegam`
B. `4.1xx10^(-4)Omegam`
C. `8.2xx10^(-4)Omega m`
D. `2.0xx10^(-3)Omegam`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

Related Questions

If the length of wire is `(100.0 cm) and radius of wire as measured from screw gauge is (1.00mm) then the specific resistance of wire material is .

2 Answers 4 Views

Calculate `[H^+],[HCOO^(-)] and [OCN^(-)]` in a solution that contains 0.1 M HCOOH `(K_a=2.4xx10^(-4)) and 0.1 M HOCN (K_a=4xx10^(-4))`.

2 Answers 15 Views

A straight , long wire carries a current a current of 20A. Another wire carrying equal current is placed parallel to it. If the force acting on a leng

2 Answers 5 Views

The figure shows a long striaght wire of a circular cross-section (radius a) carrying steady current I.The current I is unifromly distributed across t

2 Answers 4 Views

When 100 V DC is applied across a solenoid, a steady current of 1 A flows in it. when 100V AC is applied across the same solenoid, the current drops t

2 Answers 4 Views

A copper wire of length 5 cm carries a current of density `j = 1 A (mm)^(-2)`. The density and molar mass of copper are `9000 Kg m^(-3) and 63 gmol^(-

2 Answers 8 Views

A long wire is along `x = 0, z = d` and carries current in positive y direction. Another wire is along `x = y, z = 0` and carries current in direction

2 Answers 5 Views

The current density `bar(J)` inside a long, solid cylindrical wire of radius `a = 12 mm` is in the direction of the central axis, and its magnitude va

2 Answers 4 Views

A long cylinder of uniform cross section and radius R is carrying a current i along its length and current density is uniform cross section and radius

2 Answers 8 Views

Calcualte the resistance of a steel wire of length 10m and diameter 0.6mm at `0^(@)C` and `100^(@)C`. (Electrical resistivity of steel `0^(@)C` is `15

2 Answers 4 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - 3
V=IR
`=l(rho(l)/(A)) (therefore R=rho(l)/(A))`
`=((l)/(A))rhol`
`V= J rhol (therefore J=(l)/(A))`
Given , `(V)/(Jl)=(115V)/(1.4xx10^(4)A//m^(2)xx10m)`
`=8.2xx10^(-4)Omegam`

5 views Answered 2023-02-05 15:29