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- Question 1 of 17
##### 1. Question

For maximum power transfer between two cascaded sections of an electrical network, the relationship between the output impedance Z1 of the first section to the input impedance Z2 of the second section is

CorrectIncorrect - Question 2 of 17
##### 2. Question

When the optical power incident on a photodiode is 10μW and the responsivity is 0.8 A/W, the photocurrent generated (in μA) is

CorrectIncorrect - Question 3 of 17
##### 3. Question

If fixed positive charges are present in the gate oxide of an n-channel enhancement type MOSFET, it will lead to

CorrectIncorrect - Question 4 of 17
##### 4. Question

A good current buffer has

CorrectIncorrect - Question 5 of 17
##### 5. Question

A discrete-time signal x[n] = sin(pi2 n) , n being an integer, is ( read pi2 as square of pi)

CorrectIncorrect - Question 6 of 17
##### 6. Question

Consider two real valued signals, x(t) band-limited to [− 500 Hz, 500 Hz] and y(t) band-limited to [−1 kHz, 1 kHz]. For z(t) = x(t) * y(t), the Nyquist sampling frequency (in kHz) is

CorrectIncorrect - Question 7 of 17
##### 7. Question

A continuous, linear time-invariant filter has an impulse response h(t) described by

h(t) = 3 for 0<=t <= 3 and 0 otherwise.When a constant input of value 5 is applied to this filter the steady state output is

CorrectIncorrect - Question 8 of 17
##### 8. Question

The forward path transfer function of a unity negative feedback system is given by

G(s) = K / [(s +2)(s – 1)]

The value of K which will place both the poles of closed loop system at the same location is

CorrectIncorrect - Question 9 of 17
##### 9. Question

In a code-division multiple access (CDMA) system with N = 8 chips, the maximum number of users who can be assigned mutually orthogonal signature sequences is

CorrectIncorrect - Question 10 of 17
##### 10. Question

The capacity of a Binary Symmetric Channel (BSC) with cross-over probability 0.5 is

CorrectIncorrect - Question 11 of 17
##### 11. Question

The force on a point charge +q kept at a distance d from the surface of an infinite grounded metal plate in a medium of permittivity E is

CorrectIncorrect - Question 12 of 17
##### 12. Question

The Taylor series expansion of 3 sin x + 2 cos x is (in ans read number after x as power)

CorrectIncorrect - Question 13 of 17
##### 13. Question

The volume under the surface z(x,y) = x + y and above the triangle in the x-y plane defined by { 0 <= y <= x and 0 <=x <= 12} is

CorrectIncorrect - Question 14 of 17
##### 14. Question

Y-network has resistances of 10Ω each in two of its arms, while the third arm has a resistance of 11Ω. In the equivalent Δ-network, the lowest value (in Ω) among the three resistances is

CorrectIncorrect - Question 15 of 17
##### 15. Question

A 230 V rms source supplies power to two loads connected in parallel. The first load draws 10 kW at 0.8 leading power factor and the second one draws 10 kVA at 0.8 lagging power factor. The complex power delivered by the source is

CorrectIncorrect - Question 16 of 17
##### 16. Question

A BJT is biased in forward active mode. Assume VBE = 0.7 V, kT/q = 25 mV and reverse saturation current IS = 10 to the power -13 A. The transconductance of the BJT (in mA/V) is

CorrectIncorrect - Question 17 of 17
##### 17. Question

A depletion type N-channel MOSFET is biased in its linear region for use as a voltage controlled resistor. Assume threshold voltage VTH = -0.5 V, VGS = 2.0 V, VDS = 5 V, W/L = 100,Cox = 10 to the power -8 F/cm*cm and μn = 800 cm*cm/V-s. The value of the resistance of the voltage controlled resistor (in Ω) is

CorrectIncorrect