
The total current drawn from the battery by the circuit

Answer to Problem 25PP
The current drawn from the battery is
Explanation of Solution
Given:
A circuit consisting of two parallel branches of resistors, connected in series with another resistor across a 12-V battery. The series resistor uses a power of
Formula used:
The total power supplied by the source is equal to the total power dissipated in the resistors. The total power supplied by a battery of voltage V and supplying a total current of I is given by,
Now, the total power dissipated is given by,
Thus, it implies that,
Calculation:
Consider the circuit shown in Figure 1. Substituting the given power values, the power dissipated is given by,
Now, using the relations (1) and (2) and substituting the supply voltage,
Conclusion:
The total current drawn from the battery is 0.54 A.
Chapter 23 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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