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Which device has its characteristics very close to that of an ideal current source?
Wiki User
∙ 13y ago
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
Wiki User
∙ 13y ago
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Is BJT is a current control device or voltage control device?
transistor is a current controlled device. as the current flows through the base of the transistor , it works like a close switch.
What function in a circuit for a switch?
A switch is a make - break device. Its function is a circuit is to make and break the current flow of the circuit that it is in. This action then starts and stops the load that is connected in the circuit.
The current in a 100-W bulb connected to a 120-V source is?
The apparent answer to the question would be (100 W)/(120 V) = 0.8333 A, assuming that, as a pure resistance load, the light bulb has a power factor close to 1.0.
What four things are needed to complete an electric circuit?
The four elements of a complete (electrical) circuit: 1)A source of input (power supply) 2)A means of conductivity (usually wire) 3)A means by which to open and close the circuit (a switch) 4)An output device (motor, light bulb, etc)
Many circuits have a which is a device to open and close the circuit.?
A basic manual operating switch is able to open or close a circuit. There are electronic components that will also control the working of a circuit.
Is BJT is a current control device or voltage control device?
transistor is a current controlled device. as the current flows through the base of the transistor , it works like a close switch.
Which diode have characteristics very close to that of an ideal voltage source?
zener diode
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.
What is the relation between surge current and fault current?
Fault/short circuit current is the available current from the source when a short circuit occurs. It is the maximum current the source can provide, defined as an RMS value, usually without any DC offset. Surge current is the maximum instantaneous current that is drawn by "turning on" or energizing a device such as a motor or transformer. Surge current will be less than fault current. If you assume a very strong source relative to the device rating, the surge current will be solely dependent upon the device in question (so fault current and surge current have no intrinsic connection). For a transformer, inrush may be 5-7 times the self cooled full load rating. Motors are usually less than this, and depending on the starting technique and configuration can be little (20-50%) over full load rating. From these definitions, and the above paragraph, it should be clear that if you have a weak source relative to the device, the device may not be able to draw as much current as it would if connected to a stronger system. If this occurs, the voltage will dip. An example would be a system where the available short circuit power is 600MVA; A 60MVA transformer is connected to this system bus. Energizing this transformer without any sort of controled closing could result in (7) x 60MVA = ~420MVA on inrush. This is relatively close to the available short circuit power (70%), so you can expect the system voltage to dip as a result. If the available short circuit current was around 20,000MVA, energizing such a transformer would not cause any significant system voltage dip.
What is a device used to open and close an electric circuit?
The device is called a switch.
Which is the simplest electronic device capable a current signal into voltage signal?
connect a register in series with line and take the voltage at the register terminal if circuit is close.
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.
Is a current a close pathway?
a pathway has to be open to be a current.
