# Electronics - Transformers - Discussion

Discussion Forum : Transformers - General Questions (Q.No. 1)
1.
When does maximum power transfer happen from the source to the load?
When the source resistance is greater than the load resistance
When the source resistance is less than the load resistance
When there is negligible source resistance
When the source resistance equals the load resistance
Explanation:
No answer description is available. Let's discuss.
Discussion:
13 comments Page 1 of 2.

Abdul said:   8 years ago
When the resistance is common for the entire circuit from source to load then power at the source will be equal to power at the load.

Gopikkannan k t said:   1 decade ago
P = VI V = IR V is constant that is directly proportional to P.

I and R inversely proportion then power drop at Rs=Rl is high.

Mishra Pankaj P said:   1 decade ago
When the internal resistance is equal to the load resistance then the maximum power will generate according to maximum power transfer theorem.

Vijay kumar said:   1 decade ago
We know that transformer is used to transfer power from one circuit to another and also for impedance matching, it happens when "source resistance is equal to load resistance".

Yes, correct according to max. Transfer theorem, source resistence should be equal to load resistor.

Srikkaanth. S said:   1 decade ago
Answer is D. When source resistance is equal to load resistance. Proof refer Maximum power transfer theorem in Electrical Circuits.

When the internal resistance is equal to the load resistance then the maximum power will generate according to maximum power transfer theorem.

Asit kumar rout said:   1 decade ago
When the source resistance (RS) is equal to load resistance (RL) then the max power transfer from source to load.