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How many dB of attenuation translates into 50 percent of the voltage being lost to attenuation?
Wiki User
∙ 14y ago
db=20log(V1/V2) or 10log(P1/P2) Example: db=20log (100/50) db=20log(2) db=20*.3010 db=6.02
Wiki User
∙ 14y ago
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What is the difference between noise and attenuation?
Noise (as related to a radio signal I suppose) is an unwanted signal being processed by a receiver. Attenuation is a loss of the intended signal before it gets to the receiver (usually due to such things as distance, line of sight obstructions, etc.
Is induced voltage and induced currrent the same?
Induced voltage is alsocalled ghost or phantom voltage as if you apply a load it vanishes. induced voltage will be potential/electrical pressure. Amperage is the actual flow of current being used, Watts being its calibration of total power used.
What is the force that prevents all machines from being 100 percent efficient?
Friction is the force that prevents all machines from being 100 percent efficient. It produces a resisting force that hinders the machine's complete functioning. Reducing friction will enhance efficiency.
Why does a filament lamp get hot when you use high voltage?
because there is a correlation between resistance and voltage and current. The equation resistance = voltage divided by current shows that the higher the voltage, the bigger the resistance,, and the bigger the resistance the hotter the filament lamp will get because of the electrons bumping into each other which means there is a loss of energy and that energy is being transferred to the filament making the actual filament bulb hot since there is more thermal energy wasted at the end.
What is meant by negative voltage and how it creates?
Negative voltage is just a voltage that instead of being positive is negative. If you think of a voltage as a large amount of water in a reservoir, with a pipe connecting it to a basin below, the voltage is the movement of the water from the reservoir to the basin. However, a negative voltage is more like a suction from the basin back up to the reservoir. Anyway, if you connect the black ( - ) lead of a 9V battery to the black lead of another 9V battery, then the connection between the two black wires is at 0V, or Ground, and one of the batteries' leads will be at +9V, and the other will be at -9V. Negative voltages are only really used in complex circuits, such as ones that contain Operational Amplifiers, and in general doesn't matter in hobby and simple electronics.
How many dB attenuation translates into 75 percent of voltage being lost to attenuation?
100 percent means full voltage or 0 dB.When 75 percent of the voltage is lost you still have 25 percent of the voltage.25 percent means damped to (-)12 dB.
What is the attenuation level of a twisted pair cable?
Attenuation occurs in all copper cable regardless of whether it is twisted or not. This is because the copper atoms actually 'resist" the electrical voltage being applied (a physics principle).
How Attenuation measured?
RMS Output divided by input, usually expressed in deciBells. Depends on whether it is power or voltage being attenuated. Voltage, it's 20log(Vout/Vin) Power, it's 10log(Pout/Pin) The difference is because power is proportional to voltage squared.
What is dampness?
Damping is the attenuation of vibrations or oscillations.
2 horsepower how many amperes?
There's something missing from this question - voltage. Horsepower translates to Watts, with 1 hp being 735 W. But to get Wattage you need to calculate Amperes x Voltage. W/O voltage there's no way to tell how many amps you need to get 2 hp.
Why is beta radiation used to measure beta radiation?
Because its attenuation is proportional to thickness being penetrated
What term refers to a change in signal strength as a result of some of the electromagnetic energy being scattered reflected or diffracted after being issued by the transmitter?
fading also 'attenuation'
What is the difference between noise and attenuation?
Noise (as related to a radio signal I suppose) is an unwanted signal being processed by a receiver. Attenuation is a loss of the intended signal before it gets to the receiver (usually due to such things as distance, line of sight obstructions, etc.
Does a repeater reduce the effects of attenuation for a digital transmission signal?
It depends on the repeater. Those that receive a signal, buffer it in real time and pass it on as a digital signal will reduce the effects of attenuation. Those that receive a signal and regenerate it with a new clock signal will generally eliminate the effects of attenuation completely.The type of repeater used depends on where and how it is used as well as the signal that is being transmitted.
What does a vos tambien in English?
I believe it translates to 'to you too', with 'you' being plural.
What is limit of cable run between a secondary distribution center and a power distribution panel if wanting to keep voltage drop below 10 percent for the facility being energized?
150 feet
What does the voltage on a digital multimeter indicate?
It generally reads RMS value of the voltage being measured
