Materials And Components - Study Mode
[#201] When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability.
Correct Answer
(A) True
[#202] The unit for mmf is
Correct Answer
(A) A
[#203] When a material is in superconducting state and a magnetic field is applied
Correct Answer
(C) The superconducting property may be destroyed
[#204] The characteristic impedance of coaxial cable depends on
Correct Answer
(D) Logarithmic ratio of outer and inner diameter and inversely as the square root of dielectric constant
[#205] Consider the following statements relating to piezoelectric materials and their effects: 1. Stress applied to the material produces electric polarization 2. An electric field applied to the material produces strain in it 3. All piezoelectric material are also ferroelectric materials Which of the statements given above are correct?
Correct Answer
(B) 1 and 2