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Q7. a) Describe the principle of variable-capacitance transducer. (6)
b) A coil of resistance 10 ohms and inductance 100mH is connected in series with two parallel capacitors each of value 100 mF across a 250 V, 50Hz supply. determine (10)
i) The circuit current
ii) The total power factor
iii) The power taken from the supply.
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