A Car Rutte akeTutorialAssignment.aspx Home 1 Student: madiurt Class Management

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A Car Rutte akeTutorialAssignment.aspx Home 1 Student: madiurt Class Management Help ork 86 Begin Date: 3/5/2018 12 01:00 AM -Due Date:3/18/2018 11 59 00 PM End Date:3/23/2018 12.01.00 AM ) Problem 1: A car battery has an internal resistanceofr-0,019 It is connected to a starter requuin 7-77 A and it has ob. Homewo (17% an internal EMF oft-12V 33% Part (a) Input an expression for the voltage across the terminal when the starter is operating Grade Sammary Potential1009 Subsissions Attempts remaining 296 per attemp detailed view 1 2 3 Subait I give up! Hints: dedaocticn per hiet Hiats remaining2 Feedback:99 deduction per feedback 33% Part (b) what is the voltage in volts? SA 33% Part (c) On an especiall decreases to rn-9r What is the new terminal voltage in V? y cold day the starter requires more current to spin (-150A), but the metallic battery's internal resistance

Explanation / Answer

according to the concept of the current electricity

Given that

internal resistance r=0.019 ohm

current i=77 A

EMF E=12 v

now we find the terminal voltage

I=E/R+r

IR+Ir=E

IR=E-Ir

V=E-ir

terminal voltage V=Eir=12-(77*0.019)10.537 v

now we wefind the new terminal voltage

V=12-150(9*0.019)=-13.65v

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