# The concentration of minority carriers in an extrinsic semiconductor under equilibrium is

1.  directly proportional to the doping concentration

2.  inversely proportional to the doping concentration

3.  directly proportional to the intrinsic concentration

4.  inversely proportional to the intrinsic concentration

4

inversely proportional to the doping concentration

Explanation :
No Explanation available for this question

# Under  low  level  injection assumption,  the  injected minority carrier current  for an extrinsic semiconductor is essentially the

1.  diffusion current

2.  drift current

3.  recombination current

4.   induced current

4

diffusion current

Explanation :
No Explanation available for this question

# The phenomenon known as "Early Effect" in a bipolar transistor refers to a reduction of the effective base-width caused by

1.   electron-hole recombination at the base

2.   the reverse biasing of the base-collector junction

3.  the forward biasing of emitter-base junction

4.  the early removal of stored base charge during saturation-to-cutoff switching

4

the reverse biasing of the base-collector junction

Explanation :
No Explanation available for this question

# The  input  impedance  (Zi)  and  the  output  impedance  (Zo)  of  an  ideal  transconductance(voltage controlled current source) amplifier are

1.   Zi= 0, Zo = 0

2.  Zi= 0, Zo = ∞

3.  Zi = ∞, Zo = 0

4.  Zi= ∞, Zo = ∞

4

Zi= ∞, Zo = ∞

Explanation :
No Explanation available for this question

# An n-channel depletion MOSFET has following two points on its ID-VGS curve (i) VGS = 0 at ID = 12 mA and (ii) VGS = -6 Volts at ID = 0 Which  of  the  following  Q-points  will  give  the  highest  trans-conductance  gain  for  small signals

1.  VGS = -6 Volts

2.  VGS = -3 Volts

3.  VGS = 0 Volts

4.  VGS = 3 Volts

4

VGS = 3 Volts

Explanation :
No Explanation available for this question

# The  number  of  product  terms  in  the  minimized  sum-of-product  expression  obtained through the following K-map is (where, "d" denotes don't care states 1 0 0 1 0 d 0 0 0 0 d 1 1 0 0 1

1.  2

2.  3

3.  4

4.  5

4

2

Explanation :
No Explanation available for this question

# Let x(t) ↔ X (j ω) be Fourier Transform pair. The Fourier Transform of the signal x(5t - 3) in terms of X (jω) is given as

1.  (1/5) e-(j3ω/5) X (jω/5)

2.  (1/5) e(j3ω/5) X (jω/5)

3.  (1/5) e-j3ω X (jω/5)

4.  (1/5) ej3ω X (jω/5)

4

(1/5) e-(j3ω/5) X (jω/5)

Explanation :
No Explanation available for this question

# If  the  region of  convergence of  x1  [n] +  x2  [n]  is  (1/3)

1.  (1/3) < | z | < 3

2.  (2/3) < | z | < 3

3.  (1/3) < | z | < (1/2)

4.  (1/3) < | z | < (2/3)

4

(1/3) < | z | < (2/3)

Explanation :
No Explanation available for this question

# The open-loop transfer function of a unity-gain feedback control system is given by G(s) = K/((s + 1)(s+ 2))  The gain margin of the system in dB is given by

1.  0

2.  1

3.  20

4.  ∞

4

Explanation :
No Explanation available for this question

# The electric field of an electomagnetic wave propagating in the positive z-direction is given by E = âx sin(ωt - βz) + ây sin(ωt – βz + (π/2)) The wave is

1.  linearly polarized in the z-direction

2.  elliptically polarized

3.  left-hand circularly polarized

4.  right-hand circularly polarized

4