1. In attached pic what is this bulb. In circuit it is directly connected to 220Vac manis via a 470k resistor as you can see pic.
It has two filaments is it as you can see. What ac is applied it both glows. But when ac is given by clipping negative half by a diode, only one filament glows.
It has two filaments is it as you can see. What ac is applied it both glows. But when ac is given by clipping negative half by a diode, only one filament glows.
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