Question Number 39 to 50 are from Hindi language, see Hindi paper.
51. The power factor of an alternator is determined by its—
(A) Speed
(B) Load
(C) Excitation
(D) Prime mover
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52. An 8 pole wave connected d.c. generator has 900 armature conductors and a flux per pole of 0.04 Wb. At what speed it must be driven to generator 500 V?
(A) 208.33 r.p.m.
(B) 20.833 r.p.m.
(C) 900 r.p.m.
(D) 1600 r.p.m.
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53. A shunt d.c. motor of armature circuit resistance 0.25 Ω is connected to a 230 volt d.c. supply. The input line current is 8 A and the shunt field current 0.8 A. The e.m.f. generated in the armature is–
(A) 230 V
(B) 228.2 V
(C) 231.8 V
(D) 250 V
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54. The relation between Young’s Modulus (E) and bulk modulus (K) is given by the relation
(A) K= mE/3(m-2)
(B) K= mE/2(m+1)
(C) K= mE/3(m+2)
(D) K=mE2(m-1)
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55. Loss of head due to sudden enlargement is equal to—
(A) 
(B) 
(C) 
(D) 
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56. The discharge of a reciprocating pump will be maximum when the piston is at the
(A) Beginning of delivery stroke
(B) Middle of delivery stroke
(C) End of delivery stroke
(D) None of these
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57. In the circuit shown below, the current through R, is—
(A) 6 A
(B) 4 A
(C) 2 A
(D) 0
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58. Which of the following relations is correct—
(A) 
(B) 
(C) 
(D) None of these
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59. Atomic number of silicon is–
(A) 12
(B) 14
(C) 23
(D) 9
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60. n-type silicon is obtained by doping silicon with
(A) Ge
(B) Al
(C) Bo
(D) Phosphorus
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