IES-2010 IES Academy ET (Paper-I) Electronics Engineering (Paper-I)

India’s No 1IES AcademyIES-20104. Ferri-magnetic (D) ferrite(a) A-1,B-2,C-3,D-4(b)A-1,B-2,C-4,D-3(c) A-2,B-1,C-3,D-4(d)A-2,B-1,C-4,D-3Q108. Magnetic susceptibility ferro-magnetic materials is(a) +10 −5 (b) -10 −5 (c) 10 5 (d) 10 −5 to 10 −2Q109. Typical size of magnetic domains ______ (mm).(a) 1-10 (b) 0.1-1 (c) 0.05 (d) 0.001Q110. Which one of the following is soft magnet?(a) 45 Permalloy (b) CrO2 (c) Fe-Pd (d) AlnicoQ111. Example for magnetic material used in data storage devices(a) 45 Permalloy (b) CrO2 (c) Cunife (d) AlnicoET (Paper-I)Q112. Flow of electrons is affected by the following(a) Thermal vibrations (b) Impurity atoms (c) Crystal defects (d) allQ113. Fermi energy level for p-type extrinsic semiconductors lies(a) At middle of the band gap (b) Close to conduction band(c) Close to valence band(d) NoneQ114. Fermi level for extrinsic semiconductor depends on(a) Donor element (b) Impurity concentration (c) Temperature (d) AllQ115. High dielectric constant material is must for __________.(a) Insulation of wires(b) Generators(c) Switch bases(d) Generators.Q116. Dielectric constant for most polymers lies in the range of _______.(a) 1-3 (b) 2-5 (c) 4-7 (d) 6-10.Q117. Example for piezo-electric material(a) Rochelle salt(b) Lead zirconate(c) Potassium niobate (d) Barium Titanium oxideQ118. The angle between [111] and [11−2] directions in a cubic crystal is (indegrees)(a) 0 (b) 45 (c) 90 (d) 180Q119. Miller indices of the line of intersection of (−1−11) and (110) are(a) [110] (b) [101] (c) [10−1] (d) [−110]Q120. Copper behaves as a:(a) Conductor always(b) Conductor or dielectric depending on the applied electric field strength(c) Conductor or dielectric depending on the frequency(d) Conductor or dielectric depending on the electric current densitywww.iesacademy.com Email: iesacademy@yahoo.com Page-18__25, 1 st Floor, Jia Sarai, Near IIT. New Delhi-16 Ph: 011-26537570, 9810958290