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What device is used to change the scale values of an AC ammeter?
A multimeter is used in which there is options for multirange measurement of Ac current or voltages and resistances and also DC voltages
What is the procedure of storing the ac current?
AC current cannot be stored, it must be used as it is generated.
What type of electrical equipment cannot convert AC into DC?
A transformer cannot convert AC into DC.
Can you explain why oil filled capacitors must be used for capacitor run motors instead of the more economical ac electrolytic types?
Electrolytic capacitors cannot be used on an AC (alternating current) system.
Which instrument is used to measure 500 kV AC voltage?
Volt meter; And 500kV AC voltages are not measured directly - potential transformers, or capacitors are used to step 500kV down to safe voltage levels for measurement purposes (usually 66-120 volts).
What is the difference between control transformer and Potential transformer?
Control transformer used only for control supply 110,220, 24,12V AC. But Potential transformer used voltage measurement purpose.
What are two segments that have the same measurement?
If 2 segments have the same length they are known as 'congruent segments' IE: segment AB=segment AC (or AB=AC) then AB @ AC (or AB is congruent to AC)
Why pmmc instrument is cannot be used to measure ac?
Pmmc meter are most accurate instrument for DC measurement however they are unable to measure the AC quantity. The working principle is as follows: a moving coil is free to move in a external static magnetic field. And the pointer moves according to the interaction of two fields, field of static mag. and that of measuring quantity. Now in case of it is impossible to produce a sustained magnetic field, that's why we can not use PMMC to measure the ac.
Why you consider only rms value of voltages and currents in ac circuits?
RMS is most commonly used measurement for AC because the power calculated from it matches the power calculated from DC and is the true power, if there is no phase shift. Its not the only measurement, just the most generally useful. Other measurements are still useful for purposes other than power calculation.
Why dc current cannot be used in transformers?
Transformer are passive devices thattransform AC to AC by magnetics and coupling. DC IS UNIDIRECTIONAL it does not change POLARITY. While it is possible to saturate a transformer primary it output cannot reflect the change since it has reached steady state
Why won't the thermostat turn the ac on and off?
You obviously have a problem with your ac unit which cannot be dianosed here.
Is Ethernet voltage AC or DC?
It's AC. DC power is constant, and therefore cannot carry any sort of signalling along with it. Don't think that AC power inside ethernet cables can be used as is, since it depends on what kind of data in being sent across.
