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Given below are certain statements regarding the average power dissipated in different types of circuits. Identify the correct option. A. Maximum power dissipation occurs in the case of the resistive circuit and when the LCR circuit is at resonance. B. In the case of a purely inductive circuit, no power is dissipated. C. In the case of the RC circuit, power is dissipated in resistor and capacitor both.

Given below are certain statements regarding the average power dissipated in different types of circuits. Identify the correct option. A. Maximum power dissipation occurs in the case of the resistive circuit and when the LCR circuit is at resonance. B. In the case of a purely inductive circuit, no power is dissipated. C. In the case of the RC circuit, power is dissipated in resistor and capacitor both. Correct Answer Both A and B are correct

The correct answer is option 1, i.e., Both A and B are correct.

  • The correct statements regarding the average power dissipated are - 
    • Maximum power dissipation occurs in the case of the resistive circuit and when the LCR circuit is at resonance. Hence, Statement A is correct.
    • In the case of a purely inductive circuit, no power is dissipated. Hence, Statement B is correct.
  • The formula of Power in an AC circuit is - P = I2 Z cos Ø ; 
  • Thus, the average power dissipated depends not only on the voltage and current but also on the cosine of phase angle Ø between them.
  • cos Ø is termed as power factor.
    • Resistive circuit : Ø = 0, cos Ø = 1. Hence, maximum power dissipation.
    • Purely Inductive or Capacitive circuit : In the case of an inductor or capacitor, the phase difference between voltage and current is 90°. Hence, cos Ø = 0; no power is dissipated. Current in such cases is known as wattles current.
    • LCR series circuit : Power is dissipated only in the resistor.
    • Power dissipated at resonance in LCR circuit : At resonance, XC -XL = 0, so Ø = 0 ; cos Ø = 1. Hence, maximum power dissipation.

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