An impedance coil having a resistance of 25 ohms and an inductance of 20 mH is connected in parallel with a variable capacitor. For what value of C will the circuit have a power of: a) unity; b) 0.8 lagging; and c) 0.9 leading? When the source is 90 volts, 400 cps.

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Compensation Techniques

The compensation techniques are the methods that are employed in the electrical control systems to enhance the performance of the system. The performance are generally affected by the factors like lag in the compensating devices, slow response of the system of the components like sensors used in the control system. The basic compensation technique involves lag compensation, lead compensation or the combination of the both.