ECAT Pre Engineering Physics Chapter 17 online mcq test with answers for chapter 17 (Physics of Solids)

Physics ECAT Pre Engineering Chapter 17 Physics of Solid Online Test

Sr. #	Questions	Answers Choice
1	Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as	critical temperature curie temperature high temperature fixed temperature
2	Which of the following can become a good temporarily magnet	iron steel both of them none of them
3	Which of the following can become a good permanent magnet	iron steel both of them none of them
4	In a soft iron, domains are	easily oriented along external field and do not return to original random positions easily oriented along external field and readily returns to originally random position do no oriented along external field and also do not returns to originally random position none of them
5	Within each domain, the magnetic field of all the spinning electrons are	parallel antiparallel perpendicular all of them
6	The size of the domain is such that they can contain	10<sup>2</sup>to 10<sup>4</sup>atoms 10<sup>4</sup> to 10<sup>8</sup>atoms 10<sup>8</sup>to 10<sup>12</sup>atoms 10<sup>12</sup>to 10<sup>16</sup>atoms
7	The domains are of macroscopic size of the order of	centimeters meters millimeters nanomneters
8	Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called	tiny regions domains vectors none of them
9	The substance in which atoms cooperate with each other in such a way so as to exhibit a strong magnetic effect, are called	diamagnetic substances ferromagnetic substances paramagnetic substances all of them
10	The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called	diamagnetic substances ferromagnetic substances paramagnetic substances all of them
11	The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called	diamagnetic substances ferromagnetic substances paramagnetic substances all of them
12	The charged nucleus of an atom itself spins its magnetic field	equal to the field produced by orbital electrons greater than the field produced by orbital electrons much weaker than the field produced by orbital electrons none of these
13	An atom in which there is a resultant magnetic field, behaves like a tiny magnet and is called as	magnetic magnetic dipole magnetic monopole none of them
14	The magnetism produced by electrons within an atom can arise from	electrons orbiting the nucleus electrons posses a spin both motions none of these motions
15	Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at	125 K 25 K 263 K 163 K

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