# Questions tagged [ac-polarity]

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### How do I solve transformer numericals with additive polarity?

Ok, so for subtractive polarity in transformers(dots at the same side of the windings) E1/E2=N1/N2 But if it's subtractive polarity E1 and E2 are out of phase so shouldn't E1/E2=-N1/N2 Edit: Ok here ...
68 views

### Effect of Reversed Phase Polarity on Active & Reactive Power of 3-Phase System?

I am trying to investigate the Power/Energy of 3-Phase System under Different Faults. I have a Three Phase Source and Load, Load is balanced i.e same phase angle and current (Phase-Neutral V = 230 ...
41 views

### Create a polar cap with a diode?

I'm trying to order components, so I can make a board following this circuit. My problem is, I cannot find any 0.1uf capacitors, that are rated at 275VAC. The highest voltage I can find, in stock, is ...
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### Why is this power cable sometimes polarized and sometimes not?

I have a handful of power cables like this: Some have polarized male plugs, while others are not polarized. Given that the female end appears to be reversible, why are some of them polarized? I ...
606 views

### Diode - output waveform of a network

Question: Determine the output waveform for the network(assume that all diodes are ideal) The book says for the positive half-cycle it will be like this: Similarly I think that for the negative ...