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Solved: Consider the circuit shown in Fig. E25.26. The
Chapter 25, Problem 28E(choose chapter or problem)
Problem 28E
Consider the circuit shown in Fig. E25.28. The terminal voltage of the 24.0-V battery is 21.2 V. What are (a) the internal resistance r of the battery and (b) the resistance R of the circuit resistor?
Equation Transcription:
Text Transcription:
r 24.0 V
4.00 A
4.00 A
Questions & Answers
QUESTION:
Problem 28E
Consider the circuit shown in Fig. E25.28. The terminal voltage of the 24.0-V battery is 21.2 V. What are (a) the internal resistance r of the battery and (b) the resistance R of the circuit resistor?
Equation Transcription:
Text Transcription:
r 24.0 V
4.00 A
4.00 A
ANSWER:
Solution 28E
Step 1 of 3:
(a) the internal resistance r of the battery
Given data,
Terminal Voltage , =24 v
Battery voltage, =21.2 v
Current , I= 4 A
To find,
Voltage across resistor r , =?
Resistance , r=?
- The voltage drop across the resistor r of battery,
The terminal voltage () will not be completely reflected at the battery output because there will be certain voltage drop across the internal resistance r inside the battery. Therefore, the voltage output from the battery will be
. The difference in this two voltage will give the voltage drop across internal resistor r,
Substituting =24 v,
=21.2 v