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What is max neutral voltage?
220
Why is it important for all capacitors to display on their cases the maximum working voltage?
If the applied voltage exceeds they Max working voltage than capacitor can blow.
State the meaning of multiplying factor of wattmeter and with suitable example explain how it is determined?
watt meter is constructed such that it read only power on a single scale. Only single scale will available to read the measured power. In order to take the accurate reading just we measure the reading and we will multiple along with factor called multiplication factor. That's depends on on which voltage knob we connected and also the current. Multiplication factor can be determined by: Multiplication factor =(voltage range*current range*pf)/Max scale deflection.
What are the problems one can expect with low supply voltage or fluctuations in split AC?
depends on how low incoming ppower is unit will have min max allowable voltage on name plate but the lower the voltage the higher the amperage draw which can reduce life of compressor or even kill it
Why are DC touch voltage limits higher than AC touch voltage limits?
this is because in dc is steady current......so when a DC supply says 220v it means max possible voltage is 220 V but on the other hand the AC ratings are written in terms of RMS values so wen an AC supply says 220V ,then the max voltage actually is 220*1.414(i.e sq. root 2)= 311V approx....so u see AC limit has to be kept lower than DC
