Q. In an AC circuit, the power is dissipated in
Solution:
- The average power loss over a cycle is P = V ? cos ?.
- The average power dissipated depends not only on the voltage and current but also on the cosine of the phase angle ? between them. Cos ? is called power factor.
- If the circuit contains only R, it is called resistive. Here ? = 0, cos? = 1.
- There is maximum power dissipation.
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