Question 1

What is the condition for maximum power transfer in DC?

Accepted Answer

RL = Rth. Maximum power Pmax = Vth²/(4Rth) with efficiency exactly 50%.

Question 2

Does superposition apply to power?

Accepted Answer

No. Superposition applies only to voltages and currents. Power is proportional to the square of current and does not superpose.

Question 3

How is Rth found when dependent sources are present?

Accepted Answer

Use Rth = Voc/Isc or apply a test source. The kill-and-look method fails because dependent sources contribute to Rth and can even make it negative.

TGPSC AEE Electrical Ch 1.2: Network Theorems – Interactive Notes with Animations, Proofs & Solved Problems