Fast Fourier Transform Interview Questions and Answers: 1. Why FFT is needed? Ans. The direct evaluation of DFT using the formula requires N2 complex multiplications and N(N - 1) complex…
Discrete Fourier Transform Interview Questions and Answers: 1. What is zero padding? What are its uses? Ans. Let the sequence x(n) has a length L. If we want to find…
Discrete Time Signals and Linear Systems Interview Questions and Answers: 1. What do you understand by the terms: signal and signal processing? Ans. Signal: A signal is defined as any…
What is Summation Transformer? Summation devices are employed to compare the relaying quantities derived from the currents in the three phases of the primary circuit. The effectiveness of the comparison…
Difference between Static Relays and Electromagnetic Relays: The conventional electromagnetic relays are robust and quite reliable, but are required to operate under different forces under fault conditions. This leads to…
Negative Phase Sequence Relay: A negative phase sequence relay (or phase unbalance) is essentially provided for the protection of generators and motors against unbalanced loading that may arise due to…
Thyristor Control of 3 Phase Synchronous Motor: The synchronous motor is a constant speed motor and it develÂops torque only at synchronous speed which is directly proportional to supply frequency.…
Compact Fluorescent Lamp (CFL) - Working Principle, Types, Advantages and Disadvantages: A compact fluorescent lamp (CFL), also known as a compact fluorescent light or energy saving light, is a type…