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Consider the following statements for piezoelectric materials: 1. All piezoelectric materials are ferroelectric materials also. 2. Piezoelectric materials have a high value of dielectric constant. Which of the above statements is/are correct?
All ferroelectric materials are pyroelectric and piezoelectric.
Consider the following statements: 1. Both ferromagnetic and ferrimagnetic materials have domain structures; each domain has randomly oriented magnetic moments when no external field is applied. 2. Both ferromagnetic and ferrimagnetic materials make those domains that have a favourable orientation to the applied field grow in size. 3. The net magnetic moment in ferromagnetic materials is higher than that in ferrimagnetic materials. 4. The net magnetic moment in ferrimagnetic materials is higher than that in ferromagnetic material. Which of the above statements are correct?
Consider the following statements related to piezoelectric effect: 1. It gives electrical response in terms of voltage change when mechanical stress occurs in some materials. 2. It gives mechanical response in terms of dimensional change due to electrical excitation of some materials. Which of the above statements is/are correct?
Polarization in Ferroelectric materials is ___________
Which of the following is not a group of Ferroelectric Materials?
Which one of the following are true of authentic materials for language learning? a. Materials should take into consideration the socio-cultural milieu of the region. b. Materials should provide a route map for learner to move on. c. Any materials could be taught in any region.
The materials which become polarized on the application of mechanical stress are called piezoelectric.
Piezoelectric materials serve as a source of ________ .
The mechanical deformation of piezoelectric materials caused caused by an external electrical field is known as