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An idealized voltmeter is connected across the terminals of a 15.0 $\mathrm{V}$ battery, and a 75.0$\Omega$ appliance is also connected across its terminals. If the voltmeter reads $11.3 \mathrm{V} :$ (a) how much power is being dissipated by the appliance, and (b) what is the internal resistance of the battery?

(a) 1.7 $\mathrm{W}$ (b) 24.5$\Omega$

Physics 102 Electricity and Magnetism

Chapter 19

Current, Resistance, and Direct-Current Circuit

Electric Charge and Electric Field

Gauss's Law

Electric Potential

Capacitance and Dielectrics

Current, Resistance, and Electromotive Force

Direct-Current Circuits

Electromagnetic Induction

University of Washington

Hope College

University of Winnipeg

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