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Step down transformer, potentiometer or rheostats can all be used to reduce voltage.

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14y ago

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What do you call A device that increases or decreases voltage in a power line is a?

A transformer can perform this function.


What device increases or decreases the volt- age of alternating current?

A transformer can step up or step down AC voltage


In a series circuit each device that is added to the circuit decreases the what?

Depends on the device. If it is a resistor and you have a fixed voltage then the circuit will obey Ohms law. Voltage = Current x Resistance. So if R increases by adding more resistors in series and the voltage is constant, the current will decrease.


What is a device that increase or decreases voltage in a power line?

A transformer. A small example is the coil in a motorcar. A transformer, in a power line, only changes voltage in one direction under normal usage. At distribution voltages, about 8360 VAC, the voltage is monitored by a regulator. A regulator either increases or decreases the voltage automatically to insure the desired voltage is steady. This regulated voltage is then fed to Transformers to provide customers with a regulated voltage at the desired voltage.


What happens to the current in a device if the resistance of the device increases and the voltage difference stays the same?

If resistance increases and voltage stays the same, then current decreases. Ohm's Law: Current equals Voltage divided by Resistance.


In a series circuit each device that is added to the circuit decreases the?

Ohm's Law answers your question. Voltage = Current x Resistance. In a series circuit you are in effect adding resistance. If the Voltage remains constant then the answer is obvious looking at the equation above.


In a series circuit each device that is added to circuit decreases the?

Ohm's Law answers your question. Voltage = Current x Resistance. In a series circuit you are in effect adding resistance. If the Voltage remains constant then the answer is obvious looking at the equation above.


VOLTAGE is decreased then what about CURRENT?

Ohm's law: I=E/R I=Current, E=Voltage, R=Resistance. If E decreases and R remains the same, I decreases.


What device is also called a rectifier?

A rectifier is an electronic device that changes an AC voltage to a DC voltage.


In series circuit each device that's added to the circuit decreases the?

Ohm's Law answers your question. Voltage = Current x Resistance. In a series circuit you are in effect adding resistance. If the Voltage remains constant then the answer is obvious looking at the equation above.


What is mean by thresold voltage?

the device oprates on the minimum voltage. in this voltage is called threshold voltage.


Difference between Threshold voltage and knee voltage?

the voltage at which electronic device operates is callled threshold voltageand the voltage at which device show cinduction in forward biased stste