Home
Class 12
PHYSICS
When a potential difference of 2 V is ap...

When a potential difference of 2 V is applied between the ends of 1 m long and uniform metallic wire, the current density in it is found to be `4xx10^(6)Am^(2)`. Resistivity of the material of the wire is :

A

`5xx10^(-7)Omegaulm`

B

`5xx10^(-8)Omegam`

C

`5xx10^(6)Omegam`

D

`5xx10^(8)Omegam`

Text Solution

AI Generated Solution

Promotional Banner

Similar Questions

Explore conceptually related problems

When a potential difference of 3 V is applied between the two ends of a 60 cm long metallic wire, current density in it is found 10 be 1xx10^(-7)Am^(-2) Find conductivity of the material of the wire in SI system.

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 constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if

When a potential difference of 2 volt is applied across the ends of a wire of 5 m length, a current of 1 A flows through it. Calculate : the resistance across the ends of the wire if it is doubled on itself.

When a potential difference of 2 volt is applied across the ends of a wire of 5 m length, a current of 1 A flows through it. Calculate : the resistance per unit length of the wire,

When a potential difference of 2 volt is applied across the ends of a wire of 5 m length, a current of 1 A flows through it. Calculate : the resistance of 2 m length of the wire,

The potential difference between two points in a wire 75.0 cm apart is 0.938 V , when the current density is 4.40 xx 10^7 A// m^2 . What is (a) the magnitude of E in the wire? (b) the resistivity of the material of which the wire is made?

The length of a potentiometer wire is 10m and a potential difference of 2 volt is applied to its ends. If the length of its wire is increased by 1m, the value of potential gradient in volt/m will be (potential difference across potentiometer wire remain same)

When 5 V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is 2.5 xx 10^(-4) ms ^(-1) . If the electron density in the wire is 8 xx 10^(28) m^(-3) , the resistivity of the material is close to :

Calculate the potential difference across the ends of a wire of resistance 2 Omega' when a current of 1.5 A passes through it.