Home
Class 12
PHYSICS
When a 40 Vm^(-1) electric field produce...

When a `40 Vm^(-1)` electric field produced inside a conductor then `2 xx 10^(4) Am^(-2)` curren density is established in it. Resistivity of the conducot is
(1) `2 xx 10^(-3) Omega m` (2) `4 xx 10^(-3) Omega m ` (3) ` 2 xx 10^(3)Omega m ` (4) ` 4 xx 10^(3) Omega m`

A

`2 xx 10^(-3) Omega`

B

`4 xx 10^(-3) Omega m`

C

`2 xx 10^(3) Omega m`

D

`4 xx 10^(3) Omega m`

Text Solution

Verified by Experts

The correct Answer is:
A
`vec(j) = sigma vec(E)`
Promotional Banner

Similar Questions

Explore conceptually related problems

Find, volume of a cube of side a = 1.4 xx (10^-2) m.

If resistivity of 0.8M KCl solution is 2.5xx10^(3)Omega cm calculate lamda_(m) of the solution

Calculate the pH of the following solutions: a 10^(-2) M HCl b 10^(-3) M H_(2)SO_(4) c 0.2 xx 10^(-2) M NaOH d 0.3 xx 10^(-3) M Ca (OH)_(2)

A copper wire of cross - sectional area 3.4 m m^(2) and length of the wire 400m, specific resistivity of copper is 1.7 xx 10^(-8)Omega-m . Then the resistance of the wire is

Length of a hollow tube is 5 m , its outer diameter is 10 cm and thickness of its wall is 5 mm. If resistivity of the material of the tube is 1.7 xx 10^(-8) Omega xx m then resistance of tube will be

Find the resistance of a hollow cylindrical conductor of length 1.0m and inner and outer radii 1.0mm and 2.0mm respectively. The resistivity of the material is 2.0xx10^(-8)(Omega)m .

A plane longitudinal wave of angular frequency omega =1000 rad/s is travelling along positive x direction in a homogeneous gaseous medium of density d = 1kgm^(-3) . Intensity of wave is I = 10^(-10) W.m^(-2) and maximum pressure change is (Delta P)_m = 2 xx10^(-4) Nm^(-2) . Assuming at x = 0, initial phase of medium particles to be zero Amplitude of the travelling wave is (a) 10^(-6) m (b) 10^(-7) m (c) 10^(-9) m (d) 2 xx 10^(-8) m

Calculate the concentration of all species of significant concentrations presents in 0.1 M H_(3)PO_(4) solution. lf K_(1) = 7.5 xx 10^(-3), K_(2) = 6.2 xx 10^(-8), K_(3) = 3.6 xx 10^(-13)

The rms velocity molecules of a gas of density 4 kg m^(-3) and pressure 1.2 xx 10^(5) N m^(-2) is

The rms velocity molecules of a gas of density 4 kg m^(-3) and pressure 1.2 xx 10^(5) N m^(-2) is