BSNL JTO (CE) Paper 2007 with Solutions Explanations at doorsteptutor. Com Part 5

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63. Class A amplifier is used when

(A) No phase inversion is required

(B) Highest voltage gain is required

(C) DC voltages are to be amplified

(D) Minimum distortion is desired

Image of class A amplifier

Image of Class a Amplifier

Image of class A amplifier

64. Identity the correct match for the given transistor

(A) Enhancement type P channel MOSFET

(B) Depletion type N channel MOSFET

(C) Enhancement type N channel MOSFET

(D) Depletion type P channel MOSFET

65. In case a signal band limited to fermi meter is sampled at a rate less than 2 fermi meter, the constructed signal will be

(A) Distortion less

(B) Small in amplitude

(C) Having higher frequencies suppressed

(D) Distorted

66. IC which has quad input AND gates

(A)

(B)

(C)

(D)

67. Registers in which data is entered or taken out in serial form are referred as

(A) Left shift register

(B) Right shift register

(C) Shift registers

(D) None of the above

68. The expression ABC can be simplified to

69. Read the following

(1) Routh Hurwitz’s criterion is in time domain

(2)Root locus plot is in time domain

(3) Bode plot is in frequency domain

(4) Nyquist criterion is in frequency domain.

(A) and are correct

(B) and are correct

(C) and are correct

(D) All four are correct

70. Register and counters are similar in the sense that they both

(A) Count pulses

(B) Store binary operation

(C) Shift operation

(D) Made from an array of flip flops and gates integrated on a single chip.

71. In D/A converter, the resolution required is and the total maximum input is The number of bits required is

(A)

(B)

(C)

(D)

72. On different unit impulse function results in

(A) Unit parabolic function

(B) Unit triplet

(C) Unit doublet

(D) Unit ramp function

73._______watt of power is received from sun per m2 surface area of a geosynchronous satellite

(A) 100

(B) 500

(C) 2000

(D) 1000

74. The ripple factor in an LC filter.

(A) Increases with the load current

(B) Increases with the load resistance

(C) Remains constant with the load current

(D) Has the lowest value

75. In different parts of the country identical telephone numbers are distinguished by their

(A) Language digits

(B) Access digits

(C) Area codes

(D) Central office code