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Asked May 2, 2019
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Chapter 27, Problem 007
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A wire of resistance 5.1 Ω is connected to a battery whose emf ε is 4.0 V and whose internal resistance is 0.69 Ω. In 2.1 min, how much energy is (a) transferred from
eergy In the narerg s()
chemical to electrical form in the battery, (b) dissipated as thermal energy in the wire, and (c) dissipated as thermal energy in the battery?
(a) Number
(b) Number
(c) Number
Units
Units
Units
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Chapter 27, Problem 007 from A wire of resistance 5.1 Ω is connected to a battery whose emf ε is 4.0 V and whose internal resistance is 0.69 Ω. In 2.1 min, how much energy is (a) transferred from eergy In the narerg s() chemical to electrical form in the battery, (b) dissipated as thermal energy in the wire, and (c) dissipated as thermal energy in the battery? (a) Number (b) Number (c) Number Units Units Units

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Expert Answer

Step 1

Given: R = 5.1 ohm

r = 0.69 ohm

emf = 4 V

t = 2.1 min = 2.1 × 60 = 126 seconds

Find: (a) The energy transferred from chemical to electrical form in the battery.

(b) The energy dissipated as thermal energy in the wire.

(c) The energy disspated as thermal energy in the battery.

Step 2

(a) Calculate the energy transferred from chemical to electrical form in the battery as: 

Energy = power × time

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Step 3

(b) Calculate the energy disspated as thermal energy in the wire: 

...

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