Hi.

I'm writing a project about overhead lines, and have a question regarding AC and DC in overhead line.

Is there any different in the electric field if you look at AC and DC

And do you know anything about the simulation program FEMM

Hope you can help me, good day

In: Electrical Engineering

Suppose we have a 10-Hz sinusoidal voltage source, vin(t). Draw the diagram of a circuit that clamps the positive peaks to −4V. The circuit should be composed of ideal diodes, dc voltage sources, and other components as needed. List any constraints that should be observed in selecting component values. Be sure to label the terminals across which the clamped output waveform vo(t) appears.

In: Electrical Engineering

1. is sin(pi/4) causal?

2. is sin(pi/4) stable?

3. is delta(n+1) causal?

4. = ?

5. If function w [ n ] is convolved with , what will the result be?

6. if a system with signal length 4 is convolved with its own system response, what will the length of that signal be?

7. In an LTI system, x[n] * h[n]= y[n]. What is x[n-3] * h[n-2] =?

In: Electrical Engineering

RC filters and Amplifiers for signal conditioning

Q.

could you write a paragraph commenting on how the concepts
explored in this could be relevant to your envisioned future career
field

In: Electrical Engineering

Digital arithmetic:

a) Convert +35 to 2-complement

b) Convert -35 to 2-complement

c) Convert 2-complement from 1101 1101 to decimal

d) Add 35 - 35 in binary

In: Electrical Engineering

What are various Pipeline Hazards. Explain each hazard with some common solutions that arebeing employed today?

In: Electrical Engineering

A continuous signal contains the following two components:

x1(t) = 3 cos 20πt

x2(t) = 3 cos 50πt

(a) Find the minimum required sampling rate to avoid
aliasing.

(b) Draw the discrete time signals obtained after sampling, when
sampled with Fs = 100 Hz. Explain the disadvantage(s), if any, of
sampling beyond the Nyquist rate.

(c) Assume the sampling rate is Fs= 40 Hz, which components are
exposed to aliasing effects? Support your answer by showing
“Nyquist intervals” and the aliased frequencies.

In: Electrical Engineering

A low voltage digital device has a low state of 0 V and a high
state of

1.8 V. It generates a signal train of high pulses at a rate of 1
MHz, these

pulses having a 10 ns width and transition times of 100 ps.

(a) Plot the upper bound of its harmonic components up to 10
GHz.

(b) Determine the amplitudes of the third and 101st
harmonics.

(c) Determine the signal bandwidth.

In: Electrical Engineering

Good morning,

Can you introduce some basis knowledge about operational amplifier?

Thank you!!

In: Electrical Engineering

Using a voltmeter and Ammeter, Draw two optimal circuits to measure both low resistance and high resistance. Describe the source of error ( in readings) in both circuits

In: Electrical Engineering

Explain the open loop practical op-amp model

In: Electrical Engineering

explain the damping used in induction type instrument(eddy current damping)

and type of control used

In: Electrical Engineering

Make a schema for a memory size of 65536 words per 8 bits. Use 8k by 8-bit 2764 memory a) with a single decoder 388 and inverters. b) Use a decoder 2 4 and inverters? Help? How to implement?

In: Electrical Engineering

You are given a cross-coupled inverter pair in which all nodes are set to Vcc/2. Why will this configuration always move to a more stable state?

In: Electrical Engineering

500 hp, 600 V, 0.8 pf leading, 6-pole, delta-connected
synchronous motor has X_{S} = 1.2 ohm and R_{A} = 0
ohm. Assume motor is lossless.

(a) Calculate E_{A} and I_{A} for 400 hp, 0.85
leading pf load.

(b) What is the torque?

(c) If |E_{A}| is increased by 20% for the 400 hp load,
what are the new values of I_{A} and power factor?

In: Electrical Engineering