VA Homework 2: current Ele. x Chegg Study I Guided solu x c Chegg Study I Guided

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VA Homework 2: current Ele. x Chegg Study I Guided solu x c Chegg Study I Guided Solu... x G The terminals of a battery x a https://www webassign.n web/Student Assignment Responses/submit?dep 15403248 Q12 e a The terminals of a battery are connec Ea V E B My Notes o Ask Your Teacher 12. O -13 points SerCP9 18 P001 A battery having an emf of 10.20 v delivers 106 mA when connected to a 74.0 load. Determine the internal resistance of the battery. Need Help? Talk to a Tutor Submit Answer Save Progress Practice Another Version 13. -16 points SerCP9 18, P046 soln My Notes Ask Your Teache For the circuit shown in the figure below, the voltmeter reads 5.0 V and the ammeter reads 2.5 mA. 3.0 kn (a) Find the value of R. kn (b) Find the emf of the battery. (c) Find the voltage across the 3.0-kn resistor. (d) What assumptions did you have to make to solve this problem? This answer has not been graded yet. Need Help? Talk to a Tutor t than the smaller resisto Highlight A Match Case Whole Words Phrase not found 501 PM Practice Another... A 2/19/2017

Explanation / Answer

12) V =10.2 V, I =106 mA, R = 74 ohms

V = I*(R+r)

10.2 = 0.106*(74+r)

internal resistance r = 22.23 ohms

13) V = 5 V, I = 2.5 mA

(a) R = V/I = 5/2.5

I = 2 kiloohms

(b) emf = V+ Ir = 5 +(2.5*0.001*3*1000)

emf =12.5 V

(c) V(r) = I*r = 2.5*0.001*3*1000

= 7.5 V

(d) R and r resistors are in series, In series combination current is constant. And battery emf resolved into two volages, that is voltage across R and voltage across r

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