Theory about the open and short circuit test about the transformer?

Low-Pass RC Filter.

1. Design a low-pass RC filter that will attenuate the amplitude of a 400 Hz sinusoidal wave by a factor of two. Draw a schematic diagram for your filter, labeling V_in, V_out, and your specific choices for your R and C values.
2. At 400 Hz, does the output signal from your filter lead or lag the input signal? By what phase does it lead or lag?
3. On the same set of axis, sketch V_in and V_out as a function of time for several periods of the wave forms. Assume V_in to be a 400 Hz 10 V peak-to-peak sinusoidal wave. Be sure to label your axes.
4. If we change our input to a 1 kHz sinusoidal signal, by what factor will the amplitude of the output be suppressed compared with the amplitude of the input? What will the phase difference between the input and output signals be?

What are the main internal blocks that a typical FPGA (Field Programmable Gate Arrays) device consists of? Sketch what a Configuration Logic Block (CLB) internal design looks like and explain each key part of this CLB block? Label the input/output signals and logic blocks appropriately.

Introduction, Background of Study and Theory behind Induction type Instruments

Sketch the asymptotes of the Bode plot magnitude and phase for the transfer functions:

1. T(s) = 2000/(s(s+200))

2. T(s) = 100/(s(.1s+1)(.5s+1))

3. T(s) = 1/(s(s+1)(.02s+1))

Q1. Explain why tolerance is not given for a POT resistor.

Q2. List five applications where an LDR can be used.

Q3. Discuss what factors could limit the amount of energy stored in a capacitor and explain why capacitors are not useful to store energy for long time.

Q4. Explain why resistance cannot be measured when the resistor is connected to the circuit.

Q5. If you connect a wire between the terminals of a source, the source is then short-circuited. Explain what outcomes you would expect if a voltage source is short-circuited

1. A 3-phase, 20 kVA, 208 V, 4-pole Y-connected synchronous generator has a synchronous reactance of X_s = 1.5 W per phase. The resistance of the stator winding is negligible. The machine is connected to a 3-phase 208 V infinite bus. Neglect losses.

1. The field current and the mechanical input power are adjusted so that the synchronous machine delivers 10 kW at 0.8 lagging power factor. Determine the excitation voltage E_f and the power angle d.
2. The mechanical input power is kept constant but the field current is adjusted to make the power factor unity. Determine the percent change in the field current with respect to its value in part (a).

I, Sketch and describe the structure and principle of operation of a well labeled linear Traveling Wave Tube TWT

ii, What are the propagating modes, and Evanescent modes in Waveguide

Are down-sampling and up-sampling Linear Time Invariant (LTI) systems? Prove your answers.

Explain why the voltage increases less rapidly as the DC current increases.

using schering bridge to determine power loss in dielectrics

write a verilog code for a 4-bit multiplier by using 4 bit full adder

Elaborate theory behind the use of ballistic galvanometers; including diagrams and mathematical derivations