GATE PH Question Paper 2011.
GATE i.e. Graduate Aptitude Test in Engineering Physics 2011 Exam has been conducted by IISc Bangalore IIT Bombay IIT Delhi IIT Guwahati IIT Kanpur IIT Kharagpur IIT Madras IIT Roorkee. This GATE PH 2011 examination is the procedure to get the admission in M.Tech
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GATE PH Question Paper 2011
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Q.5 In a first order phase transition, at the transition temperature, specific heat of the system
(A) diverges and its entropy remains the same
(B) diverges and its entropy has finite discontinuity
(C) remains unchanged and its entropy has finite discontinuity
(D) has finite discontinuity and its entropy diverges
Q.7 The population inversion in a two level laser material CANNOT be achieved by optical pumping because
(A) the rate of upward transitions is equal to the rate of downward transitions
(B) the upward transitions are forbidden but downward transitions are allowed
(C) the upward transitions are allowed but downward transitions are forbidden
(D) the spontaneous decay rate of the higher level is very low
Q. 10 Which of the following statements is CORRECT for a common emitter amplifier circuit?
(A) The output is taken from the emitter
(B) There is 1800 phase shift between input and output voltages
(C) There is no phase shift between input and output voltages
(D) Both p-n junctions are forward biased
Q.11 A 3×3 matrix has elements such that its trace is 11 and its determinant is 36. The eigenvalues of the matrix are all known (0 be positive integers. The largest eigenvalue of the matrix is
(A) 18 (B) 12 (C) 9 (D) 6