4. A coil of resistance 1.5kS2 and 0.25 H induc- tance is connected in parallel with a variable capacitance across a 10V
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4. A coil of resistance 1.5kS2 and 0.25 H induc- tance is connected in parallel with a variable capacitance across a 10V
4. A coil of resistance 1.5kS2 and 0.25 H induc- tance is connected in parallel with a variable capacitance across a 10V, 8kHz supply. Calculate (a) the capacitance of the capacitor when the supply current is a minimum, (b) the dynamic resistance and (c) the supply current.
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