Electronics and Communication Engineering - Exam Questions Papers
Exercise :: Exam Questions Papers - Exam Paper 17
1.
A single mode fibre not suffer from which type of dispersion?
A. Waveguide dispersion B. Material dispersion C. Intermodal dispersion D. Polarization mode dispersion
Answer: Option C
Explanation:
2.
Which of the following statements is/are true for a good conductor of electricity?
Its conductivity decreases with increasing temperature. Number of free electrons is around 1028 m-3 . Its conductivity decreases with addition of impurities. It is a good conductor of heat also.
A. 1, 2, 3 and 4 B. 1 only C. 2 and 3 only D. 3 and 4 only
Answer: Option A
Explanation:
3.
How can the bandwidth of a control system be increased?
A. By the use of phase lead network B. By the use of phase lag network C. By the use of both phase-lag and phase-lead network D. By the use of cascaded amplifiers in the system
Answer: Option A
Explanation:
4.
If an electric network R, L and C are connected in series and supplied by a voltage source then its dual network will be described by the differential equation:
Answer: Option C
Explanation:
5.
A signal x 1 (t ) and x 2 (t ) constitute the real and imaginary parts respectively of a complex valued signal x (t ). What form of waveform does x (t ) possess?
A. Real symmetric B. Complex symmetric C. Asymmetric D. Conjugate symmetric
Answer: Option D
Explanation:
