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Calculate the decibel change for when an output voltage increases from 2 to 6 v?
Wiki User
∙ 14y ago
Level = 20 times log (6/2) = 20 times log (3) = 9.54 dB
Wiki User
∙ 14y ago
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What is the decibel a unit of?
Decibel is no real unit, it is a pseudo unit. The decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity. A change in voltage ratio by a factor of two is approximately a 6 dB change. A change in power ratio by a factor of two is approximately a 3dB change.
How does the ac resistance of a diode change as the voltage increases?
When the voltage increases the temperature in the diode also increases. When the temperature in the diode increases, the resistance decreases.
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If the resistance increases, while the voltage stays the same, current will decrease. Current = voltage divided by resistance
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Decibels describes changes in power, not voltage. If the question meant to say value instead of voltage, then a power change from 100 to 50 is -3 decibels, or -3dB.Decibels is 3 log2 (POWER OUT/POWER IN).
How many times louder is an 80 dB sound compared to a 40 dB sound?
1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.1000 times louder. Every 10 decibel, the intensity increases by a factor of 10.
If the voltage impressed across a circuit is constant but the resistance increases by a factor of 7 By what factor does the current change?
A: 1/7
If voltage changes in a ac circuit what happens to current?
Voltage attempts to make a current flow, and current will flow if the circuit is complete. It is possible to have voltage without current, but current cannot flow without voltage. The answer is "yes",voltage remains the same as current moves through the circuit.As the voltage remains constant, current increases in the circuit.
An RF amplifier amplifies the incoming signal by 200 times Calculate the power gain of this amplifier in dB?
If an RF amplifier amplifies the incoming signal by 200 times, the power gain of the amplifier is +25.9 dB. Power is proportional to voltage squared, so the power gain is 400. The decibel scale is 3 times log2 of the power change.
How does changing the temperature of solutions affect the amount of voltage that is going to be produced in votaic cell?
Changing the temperature increases the change in energy.
The population of a village increases from 2400 to 2520 Calculate the percentage increase?
A change from 2400 to 2520 would be a 5% increase.
Why series arrangement of batteries brighter than parallel arrangement of batteries?
Connecting batteries in series increases available voltage. Connecting them in parallel increases available current. Ohm's law states that when resistance is constant (and a light bulb is a constant resistance, to a point), the current flowing through will be directly proportional to the voltage. And when the voltage doesn't change, the only way to change the flowing current is to lower the resistance - as in, put in a smaller light bulb.
