1. Quantizing noise occurs in PCM TDM FDM PPM 2. A telephone signal with a cut-off frequency of 4 kHz is digitalized into 8-bit samples at a Nyquist sampling rate of s = 2 W. Calculate the baseband transmission bandwidth. 8 kHz 64 kHz 16 kHz 2 kHz 3. The main advantage of …
Pulse Modulation MCQ || Pulse Modulation Questions and Answers Read More »
Ques.1. The bit rate of the digital communication system is M kbps. The modulation used is 16 QAM. The minimum bandwidth required for ideal transmission is _________. M/2 kHz M/16 kHz M kHz M/8 kHz Ques.2. Which of the following signaling Scheme the least noise immunity? QAM ASK FSK PSK Ques.3. The following …
Digital Modulation MCQ || Introduction To Digital Modulation Questions and Answers Read More »
Ques.1. When the separation between two charges is made four times, the force between them increases four times decreases four times increases sixteen times decreases sixteen times Ques.2. The force per unit length between two stationary parallel wires carrying (steady) currents _____. A. is inversely proportional to the separation of wires B. is proportional …
Electrostatics MCQ – Electrostatics Questions and Answers Read More »
Ques.1. Find H = ___________ A/m at the center of a circular coil of diameter 1 m and carrying a current of 2 A. 0.6366 0.1636 6.366 2 Ques.2. Hysteresis loss is ________ proportional to the area under the hysteresis curve. Also, it is ________ proportional to the number of cycles of magnetization per …
Magnetostatics MCQ || Magnetostatics Questions and Answers Read More »
Ques.1. Which of the following is NOT true with respect to antennas? Lower frequencies are radiated near the end of transmission line Horn antennas are used to feed parabolic dish antennas Yagi-Uda antennas have high bandwidth and low gain Higher frequencies are radiated near the feedpoint Ques.2. A Cassegrain reflector antenna has a sub-reflector …
Basics of Antenna MCQ || Antenna Questions and Answers Read More »
Ques.1. The magnitude of (|E| / |H|) in a uniform plane wave is: √µε Infinity $\sqrt {\frac{\mu }{ \in }}$ 1 Ques.2. For a dominant mode in a rectangular waveguide with breadth 10 cm, the guide wavelength for a signal of 2.5 GHz will be 20 cm 18 cm 15 cm 12 cm …
Ques.1. The magnitude of (|E| / |H|) in a uniform plane wave is: √µε Infinity $\sqrt {\frac{\mu }{ \in }}$ 1 Ques.2. For transverse electric waves between parallel plates, the lowest value of m, without making all the field components zero, is equal to 3 2 1 0 Ques.3. The dispersion equation of …
Parallel Plane Waveguide MCQ || Parallel Plane Waveguide Questions & Answers Read More »
Ques.1. Optic fibers are used in: CAT scans X-ray photos Ultrasound scans Endoscopy Ques.2. For a 3-µm-diameter optical fiber with core and cladding indexes of refraction of 1.545 and 1.510, respectively. The cut-off wavelength is. 2.3 μm 1.29 μm 1.5 μm 3.24 μm Ques.3. Which fiber is preferred for long-distance communication? Step index …
Optical Fiber Questions and Answers || Optical Fiber MCQ Read More »
Ques.1. Find H = ___________ A/m at the center of a circular coil of diameter 1 m and carrying a current of 2 A. 0.6366 0.1636 6.366 2 Ques.2. What is the SI unit for magnetic reluctance? Tesla Henry Tesla-1 Henry-1 Ques.3. Which of the following materials is used for the generation of …
Electromagnetic Theory MCQ || Electromagnetic Theory Questions and Answers Read More »
Ques.1. In a dispersive medium, the group velocity is: Less than the phase velocity only Equal to the phase velocity only More than the phase velocity, depending on the nature of the dispersive medium More than the phase velocity Ques.2. The EM wave which does not propagate through a rectangular waveguide with a = …
