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**Home⇒ Engineering⇒ Exam questions papers**

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Q1 ⇒ The capacitors C_{1}, C_{3}, C_{4} and C_{5} have a capacitance of 4 μF each and the capacitor C_{2} has a capacitance of 10 μF. The effective capacitance (in μF) between the points X and Y will4 μF[other wrong options] [Discuss in forum] 6 μF 3 μF 8 μF |

Q2 ⇒ A 'n' bit sequence generator employing SR flip-flop has maximum length of the sequence as :2 - 1^{n}[other wrong options] [Discuss in forum] 2 ^{n}n 2 ^{n}^{-1} |

Q3 ⇒ (11)_{2} + (11)_{3} = (11)_{?}6[other wrong options] [Discuss in forum] 4 5 not possible |

Q4 ⇒ In the signal flow graph of figure below, the gain C/R will44/23[other wrong options] [Discuss in forum] 43048 22/15 24/23 |

Q5 ⇒ With respect to the Miller integrator sweep shown below, the sweep rate wil2[other wrong options] [Discuss in forum] 4 1.5 2.5 |

Q6 ⇒ A Hartley oscillator uses FET with g of 2 ms and _{m}r = 2 KΩ. The total coil inductance is 10 μH with turns ratio of input to output side of 1 : 10. It is tuned with a 50 pf capacitor. Find frequency of oscillations, amplifier gain margin in dB._{d}7.11 MHz, 13.97 dB[other wrong options] [Discuss in forum] 7.3 MHz, 14.1 dB 6.93 MHz, 12.9 dB 7.4 MHz, 13 dB |

Q7 ⇒ A discrete random variable X takes values from 1 to 5 with probabilities as shown in the table. A student calculates the mean of X and 3.5 and her teacher calculates the variance of X as 1.5. Which of the following statements is tBoth the student and the teacher are wrong[other wrong options] [Discuss in forum] Both the student and the teacher are right Both the student is wrong but the teacher is right The student is right but the teacher is wrong |

Q8 ⇒ Consider the circ(C + D)[other wrong options] [Discuss in forum] 0 1 (A + B) + (C + D) |

Q9 ⇒ The current I in the circuit show- j1 A[other wrong options] [Discuss in forum] j1 A 0 20 A |

Q10 ⇒ One of a loss-less transmission line having the characteristic impedance of 75 Ω and length of 1cm is short-circuit. At 3 GHz, the input impedance at the other end of the transmission line isinductive[other wrong options] [Discuss in forum] 0 resistive capacitance |

Q11 ⇒ The Z-inverse of the given Z-transform is _______unit impulse[other wrong options] [Discuss in forum] unit step unit ramp unit parabola |

Q12 ⇒ For the system with given characteristic equat4, 1, 0[other wrong options] [Discuss in forum] 3, 2, 0 4, 0, 1 3, 0, 2 |

Q13 ⇒ A uniform plane wave in the free space is normally incident on an infinitely thick dielectric slab (dielectric constant ε = 9). The magnitude of the reflection coefficient is_{r}0.5[other wrong options] [Discuss in forum] 0 0.3 0.8 |

Q14 ⇒ In the given fi3/2 rad/sec[other wrong options] [Discuss in forum] 0 rad/sec 2 rad/sec None of these |

Q15 ⇒ V_{R} at t < T, t = &in100e^{-40x104t}, 0[other wrong options] [Discuss in forum] 500 e^{-40x104t}, 0 100 e^{-40x103t}, 0 100 e^{-40x106t}, 0 |

Q16 ⇒ In a semiconductor material. The hole concentration is found to be 2 x 2.5 x 10^{15} cm^{-3}. If mobility of carriers is 0.13 m^{2}/ v-s. Then find the current density if electric field intensity is 3.62 x 10^{-19}7.6237 x 10^{-4} A/cm^{2}[other wrong options] [Discuss in forum] 7.6237 x 10 ^{-5} A/cm^{2} 7.6237 x 10 ^{-3} A/cm^{2} none of these |

Q17 ⇒ A lossless transmission line with air dielectric is 6 m long. What is the line length at 30 MHz?0.6 wavelength long[other wrong options] [Discuss in forum] 1 wavelength long 0.5 wavelength long 0.25 wavelength long |

Q18 ⇒ Consider the common emitter amplifier shown below with the following circuit parameters: β = 100, g = 0.3861 A/V, _{m}r_{0} = ∞ r = 259 Ω, R_{p}_{s} = 1 kΩ, R_{B} = 93 kΩ, R_{C} = 250 Ω, R_{L} = 1 kW, C_{1} = ∞ and C_{2} = 4.1258 Ω[other wrong options] [Discuss in forum] 258 Ω 93 kΩ ∞ |

Q19 ⇒ Consider the circuit shown below of 2 : 1 MUX is given by the function g = ac + bcXY + EXY[other wrong options] [Discuss in forum] X ⊕ Y XE + XY none of these |

Q20 ⇒ A noiseless 3 KHz channel can transmit binary at the rate __________ .6000 bps[other wrong options] [Discuss in forum] 12000 bps 10000 bps 3000 bps |

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