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Exam questions papers
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ The capacitors C1, C3, C4 and C5 have a capacitance of 4 μF each and the capacitor C2 has a capacitance of 10 μF. The effective capacitance (in μF) between the points X and Y will 4 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 : 2n - 1 [other wrong options] [Discuss in forum] 2n n 2n-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 will 44/23 [other wrong options] [Discuss in forum] 43048 22/15 24/23 |
Q5 ⇒ With respect to the Miller integrator sweep shown below, the sweep rate wil 2 [other wrong options] [Discuss in forum] 4 1.5 2.5 |
Q6 ⇒ A Hartley oscillator uses FET with gm of 2 ms and rd = 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. 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 t Both 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 is inductive [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 equat 4, 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 εr = 9). The magnitude of the reflection coefficient is 0.5 [other wrong options] [Discuss in forum] 0 0.3 0.8 |
Q14 ⇒ In the given fi 3/2 rad/sec [other wrong options] [Discuss in forum] 0 rad/sec 2 rad/sec None of these |
Q15 ⇒ VR at t < T, t = &in 100e-40x104t, 0 [other wrong options] [Discuss in forum] 500e-40x104t, 0 100e-40x103t, 0 100e-40x106t, 0 |
Q16 ⇒ In a semiconductor material. The hole concentration is found to be 2 x 2.5 x 1015 cm-3. If mobility of carriers is 0.13 m2/ v-s. Then find the current density if electric field intensity is 3.62 x 10-19 7.6237 x 10-4 A/cm2 [other wrong options] [Discuss in forum] 7.6237 x 10-5 A/cm2 7.6237 x 10-3 A/cm2 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, gm = 0.3861 A/V, r0 = ∞ rp = 259 Ω, Rs = 1 kΩ, RB = 93 kΩ, RC = 250 Ω, RL = 1 kW, C1 = ∞ and C2 = 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 + bc XY + 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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