Which of the following is/are property of Ferrites?
(1) Low resistivity
(2) High curie temperature
(3) Low permeability
(4) High dielectric constant
A conducting material should be
Heat conduction in a semiconductor takes place
The spontaneous magnetization is the most important characteristic of
Statement (I): Hard magnetic materials are used for making electromagnets.
Statement (II): Hard magnetic materials have high coercive field.
Nichrome is an alloy of
The Temperature at which iron ceases to be ferromagnetic and becomes para-magnetic is
Consider the following statements: In an n-type semiconductor 1) Fermi level lies below the donor level at room temperature(T). 2) Fermi level lies above the donor level as T0. 3) Fermi level lies in valence band. 4) Fermi level remains invariant with temperature. Which of these statements is/are correct?
Thermal conductivity ______ and Entropy _____ in superconducting state.