EC GATE 2017 PAPER 01 - Online Test
Q1. “If you are looking for a history of India, or for an account of the rise and fall of the British Raj, or for the reason of the cleaving of the subcontinent into two mutually antagonistic parts and the effects this mutilation will have in the respective section, and ultimately on Asia, you will not find it in these pages; for though I have spent a lifetime in the country. I lived too near the seat of events, and was too intimately associated with the actors, to get the perspective needed for the impartial recording of these matters”.
Here, the word „antagonistic‟ is closest in meaning to
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. In the summer, water consumption is known to decrease overall by 25%. A water Board official states that in the summer household consumption decreases by 20%, while other consumption increases by 70%.
Which of the following statement is correct?
Answer : Option D
Explaination / Solution:
Let H is house hold consumption and P is the other consumption.
Given
H × 0.8 + P × 1.7 = (H + P) × 0.75
Ratio is negative.
Q3. She has a sharp tongue and it can occasionally turn _______.
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. I ________ made arrangements had I _________informed earlier.
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. The expression for an electric field in free space is 
where x, y, z represent the spatial coordinates, t represents time, and 𝜔,k are constants. This electric field
where x, y, z represent the spatial coordinates, t represents time, and 𝜔,k are constants. This electric field
Answer : Option C
Explaination / Solution:
Q6. 
For the operational amplifier circuit shown, the output saturation voltages are ± 15V. The upper and lower threshold voltages for the circuit are, respectively.
Answer : Option B
Explaination / Solution:
Q7. A bar of Gallium Arsenide (GaAs) is doped with Silicon such that the Silicon atoms occupy Gallium and Arsenic sites in the GaAs crystal. Which one of the following statement is true?
Answer : Option A
Explaination / Solution:
Silicon atoms act as P- type dopants in Arsenic sites and n- type dopants in Gallium sites.
Q8. For a narrow base PNP BJT, the excess minority carrier concentration (ΔnE for emitter, ΔpB for base. ΔnC for collector) normalized to equilibrium minority carrier concentration (nE0 for emitter, pB0 for base, nC0 for collector) in the quasi-neutral emitter, base and collector regions are shown below. Which one of the following biasing modes is the transistor operating in?
Answer : Option C
Explaination / Solution:
As per the change carrier profile, base – to – emitter junction is reverse bias and base to collector junction is forward bias, so it works in Inverse active.
Q9. The Miller effect in the context of a Common Emitter amplifier explains
Answer : Option D
Explaination / Solution:
Miller effect increase input capacitance, so that there will be decrease in gain in the high frequency cutoff frequency.
Q10. An n+ - n Silicon device is fabricated with uniform and non-degenerate donor doping concentrations of ND1 = 1 × 1018
cm-3 and ND2 = 1 × 1015
cm-3 corresponding to the n+ and n regions respectively. At the operational temperature T, assume complete impurity ionization, kT/q = 25 mV, and intrinsic carrier concentration to be ni = 1 × 1010 cm-3, What is the magnitude of the built-in potential of this device?
Answer : Option D
Explaination / Solution:
