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Chapter 4: Q26E (page 843)

Consider the circuit shown in Figure. The terminal voltage of the 2.40 - Vbattery is 21.2 V. What are (a) the internal resistance r of the battery and (b) the resistance R of the circuit resistor?

Short Answer

Expert verified
  1. The internal resistance r of the battery is0.70Ω
  2. The resistance R of the circuit resistor is5.3Ω5.3Ω

Step by step solution

01

Determine the internal resistance of the battery

a. Use the formula of internal resistance

Substitute the given values

Thus, the internal resistance r of the battery is

02

Determine the resistance of the circuit resistor

b. Use the Ohm’s law

Substitute the given values

R=21.2v4.0AR=5.3Ω

Therefore, the resistance R of the circuit resistor is 5.3Ω

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