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The behaviour you are describing is, in fact, due to the internal resistance of the voltage source.
When a voltage source, such as a battery or generator, is not connected to a load, its potential difference is simply the electromotive force (or 'no-load voltage') of that source. When a load is connected, a load current flows not only through the load itself, but also through the internal resistance of the source. This causes an internal voltage drop across the internal resistance, which acts in the opposite sense (i.e. in accordance with Kirchhoff's Voltage Law), or direction, to the electromotive force, thus reducing the voltage available at the terminals. The greater the load (i.e. the lower the load resistance), the greater the resulting load current, and the greater the internal voltage drop -and the lower the terminal voltage.
What else can I help you with?
Why does the terminal voltage decreases as the load current increases?
A: That will happen anytime the voltage source is not able to provide the power needed for the load. If the load exceed the power available from the source the voltage will be reduced as IR drop from the source
Why secondary terminal voltage decreases with increase in load?
An increase in load (equivalent to a decrease in resistance*) causes an increase in load current. This increases the internal voltage drop within the transformer, and the terminal voltage reduces accordingly.[*An increase in load means more current is being drawn by that load, so an increase in load is equivalent to a decrease in load resistance]
Is it possible to have the full load terminal voltage greater than the no load terminal voltage?
Not normally because the supply has a small resistance and very little reactance. Therefore the application of a load causes a voltage drop in the equivalent series resistance of the supply, so its voltage becomes slightly less. A typical supply resistance can be taken from my home, which has a 240 v 60 amp supply, and the resistance is 0.1 ohms, so that a 10 amp load gives a drop of 1 volt.
What is terminal voltage?
Terminal voltage is the voltage gotten at the terminals of the load in any system.
Why terminal voltage of a self excited shunt generator decreases with an increase of load?
The terminal voltage of a self-excited shunt generator decreases with an increase in load due to an increase in voltage drop across the internal resistance of the generator. As the load current increases, the drop across the internal resistance also increases, reducing the output voltage available at the terminals. This effect is known as voltage regulation and is a common characteristic of self-excited shunt generators.
What is the difference between the terminal voltage and the source voltage?
the source voltage is the voltage that measured exactly after the voltage source , but the terminal voltage is the voltage that measured in the load terminals , which equal to the source voltage minus the drop voltage on the transmission line .
Can the terminal voltage rise under which load?
no
Can the terminal voltage rise under the load?
no
Can terminal potential difference be greater than the emf supplied?
No, the terminal potential difference cannot be greater than the emf supplied. The emf represents the maximum potential difference that the cell or battery can provide, while the terminal potential difference is the actual potential difference across the terminals when a load is connected.
What effect if excitation voltage raise on load?
The generator terminal voltage will increase.
Effect of changing load on alternator?
by changing load its terminal voltage changes.
What is the off load voltage of the generator?
Terminal voltage is the voltage between the output terminals of a generator.
