Home » Electronics and Communication Engineering » Materials and Components

Electrical conductivity of metals expressed in ohm-1 m-1 is of the order of

1010
105
10-4
10-6

Correct Answer: 105

Explanation:

Conductivity is reciprocal of resistivity. Since resistivity of metals is around 10^-7 ohm-m, conductivity is about 10⁷ ohm^-1 m^-1. So 10⁵ is the nearest value.

← Previous Question Next Question→

More Questions from Materials and Components

In a polyatomic gas, the types of polarization which exist together are
In elemental dielectrics, the orientation and ionic polarization are absent.
An electron in a homogeneous magnetic field and having velocity perpendicular to the direction of field moves
An homogeneous dielectric material is subjected to an electric field E. If a small cavity is made inside the material, the electric field intensity inside and outside the cavity are different.
A particle of charge Q coulombs is bound elastically to an equilibrium position with a force constant of f newton per metre. The polarizability of the system is
In an hydrogen atom, an electron moves in the field of a proton. The stability of orbit requires equilibrium between coulomb's force and centrifugal force.
An electron shell corresponding to principal quantum number n can contain a maximum of
Assertion (A): Dielectric losses are proportional to tan δ. Reason (R): tan δ = where ∈r' and ∈r" denote the real and imaginary parts of ∈r.
Spontaneous polarization occurs in ferroelectric materials.
For a core having a relative permeability μr, magnetic dipole moment per unit volume M and field strength H, the flux density B is

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion