Materials And Components - Study Mode
[#156] Some ceramic superconductors become superconducting
Correct Answer
(A) below liquid helium temperature
[#157] Consider the following statements: 1. Type-I superconductors undergo abrupt transition to the normal state above a critical magnetic field. 2. Type-II superconductors are highly technologically useful super-conductors
because the incidence of a second critical field in them is useful in the preparation of high field electromagnets. Which of the above statements is/are correct?
Correct Answer
(C) Both 1 and 2
[#158] Which of the following exhibit electric hysteresis?
Correct Answer
(D) Both ferroelectric and ferrielectric materials
[#159] The piezoelectric effect is the polarization of a dielectric under the influence of
Correct Answer
(B) Mechanical stress
[#160] The superconductivity is due to
Correct Answer
(A) The crystal structure having no atomic vibration at 0°K