d) Mention one common example of a capacitive (i.e., RC) load. e) Mention the purpose of the capacitor and two examples of equipment that are used for this purpose in power systems.
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To solve the above problem, one should have a basic idea about the working of AC circuits.
The above-given circuit is an R-L-C circuit.
In AC circuits having energy storage elements like L and C, their impedance is a function of the supply frequency.
AC circuits cannot be solved directly by applying rules of arithmetic. To solve the AC circuits, we have to solve them in the phasor domain where reactive components are added together and resistive components together, and to add both, a phasor sum is required.
Active power is only consumed by resistive loads and reactive power in the circuit comes from the inductor and capacitor connected in the circuit.
If reactive power is zero, either the circuit is in resonance, or no inductors and capacitors are present in the circuit.
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