GATE EC Question Paper Answers 2015 Download PDF

GATE Electronics and Communication Engineering (EC) Previous Year Question Paper 2015

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GATE Electronics and Communication Engineering (EC) Question Papers 2015

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GATE Electronics and Communication Engineering (EC) Question Paper 2015 Download PDF File:

1. A region of negative differential resistance is observed in the current voltage characteristics of a silicon PN junction if

  • (A) both the P-region and the N-region are heavily doped
  • (B) the N-region is heavily doped compared to the P-region
  • (C) the P-region is heavily doped compared to the N-region
  • (D) an intrinsic silicon region is inserted between the P-region and the N-region

2. In an 8085 microprocessor, the shift registers which store the result of an addition and the overflow bit are, respectively

  • (A) B and F
  • (B) A and F
  • (C) H and F
  • (D) A and C

3. Negative feedback in a closed-loop control system DOES NOT

  • (A) reduce the overall gain
  • (B) reduce bandwidth
  • (C) improve disturbance rejection
  • (D) reduce sensitivity to parameter variation

4. Which one of the following processes is preferred to form the gate dielectric (SiO2) of MOSFETs ?

  • (A) Sputtering
  • (B) Molecular beam epitaxy
  • (C) Wet oxidation
  • (D) Dry oxidation

5. If the base width in a bipolar junction transistor is doubled, which one of the following statements will be TRUE?

  • (A) Current gain will increase.
  • (B) Unity gain frequency will increase.
  • (C) Emitter-base junction capacitance will increase.
  • (D) Early Voltage will increase.

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