theequivalentresistorofthecircuit
For the three branches in the circuit, each branch has two resistors in series; 80, the equivalent resistor of each branch is the
sum of the two resistors as shown by step (1) in the ?gure below.
Now, we have three resistors in parallel; Using equation 262, the equivalent resistor is given as followg
have three resistors in series, thus the equivalent resistor of the circuit is
Using Ohm‘s law, the current of the circuit is;
Sincetheresistor20Qisinseries,thesamecurrentis?owingthroughit.
From equation (25.18), the pOWer dissipated in a resistor R with current I flowing through is given by:
Now, we plug our values for R20 Q and I, so We get the pOWer dissipated in the resistor 20 Q:
r 20 Q:
This is the rate of energy change from electic energy to thermal energy