How to solve the problem by the method of equivalent transformations?

G

Gulnara2020-11-04 13:49:38

Electronics

Gulnara, 2020-11-04 13:49:38

In an electric circuit, , the EMF of the source and the resistance of the resistors are known. Calculate the power supply current and the active power drawn by the load.
(Method of equivalent transformations)

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2 answer(s)

M

milssky, 2020-11-04
@milssky

www.ets.ifmo.ru/usolzev/SEITEN/u1/t_1/t_1_2/t_1_2_...

V

VT100, 2020-11-04
@VT100

In this scheme, "inconvenient" is R3, because it is possible to calculate algebraically (according to Ohm's law and Kirchhoff's rules) the voltage on it (the current through it), but it is more difficult.
By converting the section R1-R4-R3 (or another "triple" of load resistances) from a "star" to a "triangle" or vice versa, you can significantly simplify the circuit and reduce the entire load to one single resistance. To answer the question of the problem - this will be enough.
Details are in milssky 's answer .