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BARC ECE 2019 : Mini Mock -1
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Question 1
As x varies from —1 to +3, which one of the following describes the behavior of the function f (x) = x3-3x2 + 1?
Question 2
Let for some a, b ∈ R. Suppose that 1 and 2 are eigen values of A and
Question 3
Consider the 5 × 5 matrix It is given that A has only one real Eigen value. Then the real Eigen value of A is
Question 4
Consider a square matrix Where x is unknown. If the eigenvalues of the matrix A are and the x is equal to
Question 5
Consider the following equations
The system of equation will be
The system of equation will be
Question 6
The circuit of fig. the transistor parameters are , . If then the width to-length ratio required in each transistor is
Question 7
For the given circuit shown below, for both transistor and The value of R1 is _______ kΩ.
Question 8
Consider the common emitter amplifier shown below with the following circuit parameters:
β =100, gm = 0.3861 A/V, r0 = ∞, rp = 259 W, RS = 1kΩ,
RB = 93KΩ, RC = 250Ω, RL=1kΩ, C1=∞ and C2 = 4.7μF.
The resistance seen by the source Vs is
β =100, gm = 0.3861 A/V, r0 = ∞, rp = 259 W, RS = 1kΩ,
RB = 93KΩ, RC = 250Ω, RL=1kΩ, C1=∞ and C2 = 4.7μF.
The resistance seen by the source Vs is
Question 9
In the following circuit, V0 is
Question 10
Three identical cascaded amplifier stages have an overall upper 3 dB frequency of 20KHz and a lower 3 dB frequency of 20Hz. What are fL and fH respectively. Assume non- interacting stages.
Question 11
A BJT has β = 50, base collector leakage current = 3.3μA. If transistor is connected in common emitter configuration. Then what will be the leakage current ICO if base current is 0.
Question 12
In the circuit shown below, the op-amp is ideal, the transistor has and . Decide whether the feedback in the circuit is positive or negative and determine the voltage V at the output of the op-amp.
Question 13
Consider two BJTs biased at the same collector current with area Assuming that all other device parameters are identical, kT/q = 26 mV, the intrinsic carrier concentration isthe difference
between the base-emitter voltages (in mV) of the two BJTs
Question 14
Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?
Question 15
Consider a random process where the random phase is uniformly distributed in the interval The auto-correlation
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ESE & GATE ECGeneralDec 31ESE & GATE EC