Question

An alternating current generator has an internal resistance Rg and an internal reactance Xg. It is used to supply power to a passive load consisting of a resistance Rg and a reactance X_L. For maximum power to be delivered from the generator to the load, the value of X_L is equal to ______.

Options

• zero

• X_g

• – X_g

• R_g

Answer 1

An alternating current generator has an internal resistance Rg and an internal reactance Xg. It is used to supply power to a passive load consisting of a resistance Rg and a reactance X_L. For maximum power to be delivered from the generator to the load, the value of X_L is equal to `underline(- X_g)`.

Explanation:

For maximum power to be delivered from the generator (or internal reactance X_g) to the load (of reactance, X_L),

⇒ X_L + X_g = 0  .....(The total reactance must vanish)

⇒ X_L= – X_g