List of top Electronics and Communication Engineering Questions

The curl of a vector field \( F \) is zero throughout a region of space. What does this imply about the behavior of \( F \)?
In which scenario would you expect the highest amount of refraction to occur when an electromagnetic wave passes from one medium to another?
Which one of the following field patterns represents a TEM wave traveling in the positive \( z \)-direction?
Add the two numbers 87H and 79H in the 8085 microprocessors, then
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
Which of the following statement is correct with respect to Latch?
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?
How many users or voice channels are supported for each 200 KHz channel in GSM?
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
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
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
At a given probability of error, binary coherent FSK is inferior to binary coherent PSK by
Which of the following analog modulation schemes requires the minimum transmitted power and minimum channel bandwidth?
A transfer function of control system does not have pole-zero cancellation. Which one of the following statements is true?
In the signal flow graph of figure \( \frac{y}{x} \) equals
signal flow graph of figure
Routh Hurwitz criterion is used to determine
If the characteristic equation of a closed-loop system is \( s^2 + 2s + 2 = 0 \), then the system is
In a Proportional-Integral-Derivative (PID) controller
Consider a stable linear time-invariant (LTI) system with a transfer function G(s). Which of the following statements regarding Bode and Nyquist plots is true?