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Which devices have characteristics very close to that of an ideal current source?
Most sources attempt to provide a specific voltage by design. An ideal current source does not do this, and thus there are not very many good examples. A current transformer, like what is used for relaying and metering in the power system, is an ideal current source - it provides a direct reflection of the amount of current flowing in the primary side to th secondary side, regardless of voltage in the secondary (up to saturation of the transformer).
A transistor amplifier may be set up as a current source as well. As in the above example, if the output resistance becomes too large, saturation of the transistor will occur causing it's characteristic output to be nonlinear.
A battery is an ideal voltage source in series with a variable resistance (the internal resistance of the battery). A charged capacitor can be thought of the same, without the internal resistance (since this is extremely small compared to the capacitance, it can be ignored in many cases).
A generator could be considered either a constant current source or voltage source, depending on how it is run. In some instances, a constant current will cause output voltage to increase or decrease. This variance can be controlled (to an extent) with external devices (capacitor and inductor banks, switching in and out specific lines, etc.). A generator can also be set up to provide a specific output voltage.
What else can I help you with?
Which diode have characteristics very close to that of an ideal voltage source?
zener diode
What is Hall effect and what is a Hall effect current transformer?
a current flow close to a magnetic source it influence the sources hall effect is a disturbed signal as a function of speed.
What happens when a curcuit is closed?
To close a circuit in electrical terminology is to close any open devices that are in series with a connected load. Once this happens the current will flow through the load and the load is then termed as energised. In the case of a motor circuit the motor will operate. In the case of a lighting circuit the lamps in the circuit will energise and light the area in which they are installed.
What happens to the power in a circuit when a resistor shorts?
Since the short circuit is very close to zero o0hms, most of the current will flow in the shorted wire. For practical purposes this would be all of the measurable current and it would pull the maximum current that could be supplied by the source since V = Current x Resistance. Since V/R = I as R goes to zero I goes to infinity. However, as a practical matter a source can only supply so much current.
What electronic part is used to close a circuit when current is passed through it?
Sounds like a relay to me.
Which device has its characteristics very close to that of an ideal current source?
A: A current source can be defined as a zero impedance source. A battery is essentially a zero impedance since it can provide lots of current with zero volts out
Which diode have characteristics very close to that of an ideal voltage source?
zener diode
What happens when you close a circuit?
When you close a circuit, it allows an electric current to flow from the power source, through the connected components, and back to the power source. This flow of electricity enables electrical devices to function and operate as intended.
How do you calibrate your VOM?
A: Three way must have a resistance and voltage source and current source to a very close tolerance,
Characteristics of close corporation?
characteristics of close corporation
What are voltage controlled voltage source?
when the magnitude of voltage of a source is controlled by another small voltage source in the circuit the former is called voltage controlled voltage source and the later is called controller voltage source.
Which diode has its characteristics very close to that of an ideal voltagesource.1.zener diode 2.vacuum tube diode 3. crystal diode?
The Zener diode has the characteristics of a constant voltage source.
What is Hall effect and what is a Hall effect current transformer?
a current flow close to a magnetic source it influence the sources hall effect is a disturbed signal as a function of speed.
Is a current a close pathway?
a pathway has to be open to be a current.
How cable hi pot test be done?
with a voltage source and a current meter and log log paper. (hi-pot tester) plot the voltage vs the current when the line starts to bend or knee you are close to the failure voltage
What does GPS contians?
GPS stands for global positioning system. A GPS contains maps. Many of the GPS devices also contain the ability to see restaurants and gas stations that are close to your current location.
Is the neutral wire hot in an electrical circuit?
No, the neutral wire is not hot in an electrical circuit. It carries the return current back to the power source and is typically at a voltage close to ground.
