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A grounded metal shield that is around a signal wire prevents outside electric fields from reaching the signal wire. This is because electrons are free to move in a metal and the electrons in the metals surface move in response to the outside electric field. Below the metal surface the electric field is canceled by the field created by the electrons that have been drawn to the metal surface by the outside field, which is the noise source. Since the signal wire is within the metal cage it does not receive the noise.
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When the length of air gap is increased in an induction motor what will also increase?
Power factor reduces overload capacity increased noise reduces
What is the diff between analog ground and digital ground?
Typically digital circuits will pump a lot of fast transient currents into the ground. Since real grounds have resistance and inductance, this will produce a drop between the ground of the digital circuits and the power supply ground. This is the so called "ground bounce". If an analog circuit ground shares ground path between the digital ground and the power supply ground, it will see this voltage drop. Depending on the common mode rejection of the analog circuit in question and the frequency components in the "ground bounce" this may or my not be an issue. If it's an issue, the easy solution is to connect the analog ground directly to the power supply ground without sharing any of the path from digital ground to main power supply ground. This way the current spike induced drops in the digital ground don't show up in the analog ground. A good example would be ADC grounding for the digital and analog portions of the ADC chip.
How can noise be converted into electrical energy?
Audio frequency is converted into electrical pulse, with the help of a diaphragm vibrating depending upon the electomagnetic pulses.
A digital circuit can be corrupted by electrical noise having a value of?
1 volt
What is the purpose of isolation transformer?
An isolation transformer (or more commonly, amplifier) reduces noise in the system from the power source. This is especially necessary in medical applications where the signals that are being read are very tiny and even a small amount of noise can disrupt a signal and make it unreadable.
What is a noise generator used for?
A noise generator produces electrical signals in both audio and video format. These are used for troubleshooting purposes in signal circuits for amplifiers and televisions.
How do you reduce the noise in electrical circuits?
Depending on the circuit, typically a combination of a coil (commonly called a choke) and a capacitor can be put in circuit at multiple places to significantly reduce noise in a circuit.
In electricity what is a dirty ground?
A noisy or "dirty ground typically refers to building electrical grounds present at the electrical receptacles. It can refer to a corrupted ground system or to a ground system designated as dirty because it carries the ground currents from heavy machinery. A dirty ground may have large noise currents flowing in it and can develop significant noise voltages from receptacle to receptacle.
What has the author B Schiek written?
B. Schiek has written: 'Noise in high-frequency circuits and oscillators' -- subject(s): Electronic circuits, Electronic circuit design, Noise, Electromagnetic noise, OverDrive, Engineering, Nonfiction, Technology
If sampling frequency doubles then quantization noise?
reduces
What has the author Peter J Fish written?
Peter J. Fish has written: 'Electronic noise and low noise design' -- subject(s): Electronic circuits, Noise, Electronic noise
Electrical noise is called?
harmonics
What is the function of balancing line in a centrifugal pump or compressor?
The balancing line is a transmission line consisting of two conductors of the same type, that are grounded to the compressor's circuits and to the ground and helps keep external noise down.
Electrical disturbance that can degrade communications?
Noise
What is electrical disturbance that can degrade communications?
Noise
Purpose of a resonator?
It reduces the amount of harmonic drone created by the exhaust noise.
What does a CFL with choke mean?
A CFL is a Compact Florescent Lamp. Compact florescent lamps are more complex than a traditional lightbulb, and the circuits inside the CFL create electrical "noise" in that can affect other devices. The choke is a coil or inductor that is designed to filter out the noise to reduce it's interference with other devices.
