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प्रश्न
Draw a graph to show variation of capacitive-reactance with frequency in an a.c. circuit.
उत्तर
where XC is the capacitive-reactance and v is the frequency in an a.c circuit.
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संबंधित प्रश्न
You are given three circuit elements X, Y and Z. When the element X is connected across an a.c. source of a given voltage, the current and the voltage are in the same phase. When the element Y is connected in series with X across the source, voltage is ahead of the current in phase by π/4 . But the current is ahead of the voltage in phase by π/4when Z is connected in series with X across the source. Identify the circuit elements X, Y and Z. When all the three elements are connected in series across the same source, determine the impedance of the circuit.Draw a plot of the current versus the frequency of applied source and mention the significance of this plot.
Three capacitors of capacities 8 μF, 8 μF and 4 μF are connected in a series and potential difference of 120 volt is maintained across the combination. Calculate the charge on capacitor of capacity 4 μF.
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A light bulb is rated 100 W for 220 V ac supply of 50 Hz. Calculate
(i) The resistance of the bulb;
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(c) a capacitor but no inductor
(d) neither an inductor nor a capacitor
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Which of the following graphs represents the correct variation of inductive reactance XL with frequency u?
