A resistor R and `2muF` capacitor in series are connected to a 220V dc supply. Across the capacitor is a neon bulb that strikes at 120V. Calculate the
A resistor R and `2muF` capacitor in series are connected to a 220V dc supply. Across the capacitor is a neon bulb that strikes at 120V. Calculate the value of R to make the bulb strike 5s after the switch has been closed.
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