Problem 21.43 A circuit consists of a 12.0-V battery connected to three resistor

Question

Problem 21.43

A circuit consists of a 12.0-V battery connected to three resistors (43? , 18? and 110? ) in series.

Part A

Find the current that flows through the battery.

Express your answer using two significant figures.

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Part B

Find the potential difference across the 43? resistor.

Express your answer using two significant figures.

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Part C

Find the potential difference across the 18? resistor.

Express your answer using two significant figures.

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Part D

Find the potential difference across the 110? resistor.

Express your answer using two significant figures.

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Explanation / Answer

A)
I=V/(R1+R2+R3)
=12/(43+18+110)
=0.07 A

B)
V1= I*R1
   = 0.07 * 43
= 3.01 V

C)
V2= I*R2
   = 0.07 * 18
= 1.26 V

D)
V3= I*R3
   = 0.07 * 110
= 7.7 V

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