ECAT Pre Computer Science Chapter 17 MCQ Test With Answer

Top Scorers Of ECAT Physics Chapter 17 Physics of Solids MCQ`s Test

Sr.#	Question	Answer
1	The band above the valence band is called	A. high energy band B. conduction band C. empty band D. none of them
2	When a silicon crystal is doped with a pentavalent element, then the atom of the pentavalent element is known as	A. acceptor B. donor C. either of them D. none of them
3	The modulus of elasticity can be written as	A. stress x strain B. strain/stress C. 1/2 x stress x strain D. stress/strain
4	The crystalline structure of NaCI is	A. rectangular B. hexagonal C. tetrahedral D. cubical
5	The solids are classified as:	A. Metals B. Crystalline C. Amorphous D. Polymeric
6	Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called	A. tiny regions B. domains C. vectors D. none of them
7	Each atom in a metal crystal vibrates about a fixed point with an amplitude that:	A. Decrease the rise in temprature B. Is not affected by rise in temprature C. Increase with rise in temprature D. Both (B) and (C)
8	The critical temperature of mercury is	A. 1.18 K B. 4.2 K C. 3.72 K D. 7.2 K
9	The valence band of an atom in a solid	A. is always empty B. may or may not be empty C. can never be empty D. none of them
10	Polymeric solids have	A. low specific gravity B. high specific gravity C. either of them D. none of them