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Question

Item 5 MasteringPhysics Item 5 MasteringPhysics Item 5 MasteringPhysics Item 5 MasteringPhysics 5 of 5 Item 5 Item 5 Consider the potential difference between pairs of points. Let ?Vab be the magnitude of the potential difference between any two points, point a and point b. Consider the potential difference between pairs of points. Let ?Vab be the magnitude of the potential difference between any two points, point a and point b. Consider the potential difference between pairs of points. Let ?Vab be the magnitude of the potential difference between any two points, point a and point b. Part A Tap image to zoom Express your answer to two significant figures and include the appropriate units. ? V14 = 5.0 V SubmitGive Up Correct ? V14 = 5.0 V ? V14 = 5.0 V SubmitGive Up Correct Correct Correct Part B Tap image to zoom ? V14 = 5.0 V

Explanation / Answer

last right most two 5 ohm resistors are in series. so their equivalent will be

R' = 5 + 5 = 10 ohm

now two 10 ohm are in parallel.

1/R" = 1/10 + 1/10

R" = 5 ohm

again same .

so Req = 5 + 5 = 10 ohm

current through battery, I = 10 / 10 = 1 A

V1 = 10 - (5 x 1) = 5 volt

so PD across 10 ohm will also be 5 volt.

current throught 5 ohm = 1 - (5/10) = 0.5 A

now PD across next 10 ohm resistor,

V = 5 - ( 5 x 0.5) = 2.5 volt

V24 is equal to PD across this (second) 10 ohm resistor.

V24 = V = 2.5 volt .......Ans

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