w Insert Format Tools Table Window Help aPhysics 102 2018. Compatibility Mode sa

Question

w Insert Format Tools Table Window Help aPhysics 102 2018. Compatibility Mode saved to my Mac a. Insert Design Layout References Mailings Review View Times New R. 10 3k 1k 7. Note: Treat all given values as 4 significant figures. Parts a-d are done with the switch open. a. What is the voltage across Rs? b. What is the current through R? e. What is the current through the Emf with the switch open? d. What is the total resistance? e. If the fuse is rated at 25mA. what resistance, R, will cause the fuse to ust blow when the switch is closed?

Explanation / Answer

(a)

R1 is connected paralle to battery

V3 = 12 v

part (b)

current in R1 = I1 = E/R1 = 12/2000 = 6 mA

part (c)

I = I1 + I2 + I3

I = E/R1 + E/R2 + E/R3

I = 12/2000 + 12/3000 + 12/1000

I = 22 mA

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part (d)

total resistance Rtotal = E/I = 12/(22*10^-3) = 545.45 ohms

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part (e)

I = 25 mA

Ifuse = I + E/Rx

25*10^-3 = 22*10^-3 + 12/Rx

Rx = 4000 ohm

Rx = 4 kilo ohms

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