List of top Electronics and Communication Engineering Questions

The purpose of using a transmission line segment with a length of \( \lambda/4 \) in impedance matching is
The primary advantage of using a rectangular waveguide over other transmission line types is
Fundamental principle behind the propagation of light in dielectric waveguides and optical fibers is
The curl of a vector field \( F \) is zero throughout a region of space. What does this imply about the behavior of \( F \)?
Which one of the following field patterns represents a TEM wave traveling in the positive \( z \)-direction?
If an electromagnetic wave travels in the positive \( x \)-direction, and its electric field oscillates in the \( y \)-direction, what is the polarization of the wave?
Which of the following is not a source of magnetostatic fields?
In a transmission line with a characteristic impedance \( Z_0 \), what happens if the load impedance \( Z_L \) matches \( Z_0 \)?
In which scenario would you expect the highest amount of refraction to occur when an electromagnetic wave passes from one medium to another?
Which of the following assertions accurately describes Gauss's theorem?
Which of the following statement is correct with respect to Latch?
The output of each stage of flip-flop is connected to input of next stage flip-flop and the complement output of the last stage flip-flop is again connected to the input of first stage flip-flop then this is called
Add the two numbers 87H and 79H in the 8085 microprocessors, then
Which theorem relates the line integral of a vector field over a closed curve to the surface integral of the curl of the field over the surface bounded by the curve?
Match the following:
convert alternating current
The midband gain of an amplifier is 100 and the lower cutoff frequency is 1kHz. The gain of the amplifier at a frequency of 20Hz is approximately
How many users or voice channels are supported for each 200 KHz channel in GSM?
The use of non-uniform quantization leads to
For a modulation index much less than 1, the FM signal is considered as
A TDMA system uses 25 MHz for the forward link, which is broken into radio channels of 200 kHz. If 8 speech channels are supported on a single radio channel, how many simultaneous users can be accommodated?
Coherent demodulation of FSK signal can be detected using
Identify the true statement with reference to immediate addressing mode
A transfer function of control system does not have pole-zero cancellation. Which one of the following statements is true?
If the highest modulation frequency is 5 kHz, find out bandwidth.
In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately equal to