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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.
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]
How do you determine the polarity of transformer windings?
They are marked on the transformer. H1 and H2 primary, X1 and X2 secondary. Dual voltage primary H1, H3 H2, H4, Dual voltage secondary X1, X3, X2, X4.Additional Answer for Unmarked TransformerFor a completely unmarked transformer, a continuity test will confirm which terminals belong to which windings, and a resistance test will identify the high-voltage (higher resistance) and low-voltage (lower resistance) windings. In North America, HV winding terminals are identified by the letter 'H' and LV windings by the letter 'X'. For a two-winding, four terminal, transformer, to test for polarity, the transformer should be orientated so that the HV windings are on the far side of the transformer, and the LV windings are on the nearest side. By convention, the left-hand HV terminal is then marked H1, and the right-hand terminal is marked H2. The LV terminal adjacent to H2 is then connected to terminal H2, so that both the HV and LV windings are in series. A voltmeter is then connected between the LV terminal adjacent to H1, and the H1 terminal itself. A low-voltage supply is then connected across the HV windings (i.e. between H1 and H2). If the voltmeter registers a voltage higher than that applied to the HV windings, then the transformer is of additive polarity, and the LV terminal adjacent to H2 should be marked X1 and the LV terminal adjacent to H1 should be marked X2. If, on the other hand, the voltmeter reading is less than the applied voltage, then the transformer is of subtractive polarity, and the LV terminal adjacent to H2 should be marked X2, and the terminal adjacent to H1 should be marked X1.By convention, when terminal H1 'goes positive' during the AC sine-wave, then terminal X1 should also 'go positive'.A similar process applies to multi-winding multi-terminal transformers. Again, the windings of such transformers must have their terminals identified first -a simple continuity test will reveal these. The rule is that an odd number (e.g. H1, etc.) represents the 'start' of a winding, and an even number (e.g. H2) represents the 'end' of a winding. Again, a simple resistance test will identify the high-voltage (higher resistance) and low-voltage (lower resistance) windings.For UK transformer, HV windings are identified as A-B, etc., and LV windings as a-b, etc.
Is diffusion current in diode is due to voltage?
When it's forward biased, carrier dffuses from positve terminal of the v source to the negative terminal ". Whereas in reverse bias mode, minority carrier currents are due to thermal energy only. remember: voltage s d amt of energy needed 4 each charge to pass frm 1 pt to the othr pt.
If A generator has an armature resistance of 0.6 ohms and when connected to a load of 40.9 ohms passes a current of 3.5 A what is the terminal voltage and generated EMF?
145.25 v
If the excitation of generator changes what happens to the terminal voltage?
By Decreasing the excitation voltage the terminal voltage will decrease and similarly by increasing the excitation voltages the terminal voltage will also increases.
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 .
When measuring voltage how should test probes be connected?
The red test probe is typically connected to the positive terminal and the black test probe is connected to the negative terminal. This ensures that the voltage measurement is accurate and corresponds to the polarity of the circuit being tested.
What is the off load voltage of the generator?
Terminal voltage is the voltage between the output terminals of a generator.
What is difference between nominal and terminal voltage?
The rated voltage of a motor listed on the nameplate is called the terminal voltage. This indicates the actual voltage on the motors terminals at which at which the manufacturer designed to operate. Whereas, Nominal voltage is the design or configuration voltage of the electricity distribution system.
What effect if excitation voltage raise on load?
The generator terminal voltage will increase.
How do you explain excitation?
by increasing the terminal voltage
Can the terminal voltage rise under the load?
no
Can the terminal voltage rise under which load?
no
What is open circuit characteristic?
The terminal voltage is equal to the supply voltage and there is zero current.
What are independent and dependent sources?
An independent source is a source that produce constant currents and voltage. Dependent sources are voltage sources that depend on a voltage somewhere else in the network.
DC voltage has no polarity?
A DC voltage must have a polarity, however this polarity is always in reference to some common point and has no meaning on its own, the same with voltage. Usually this common point is the circuit ground, which may or may not be earth ground. Example: A household AA battery has a positive and a negative terminal, the positive terminal is +1.5v in relation to the negative terminal, and the negative terminal is -1.5v to the positive terminal.
