A and C. Express your answer to two significant figures and include appropriate

Question

A and C. Express your answer to two significant figures and include appropriate units.

Problem 21.37 Part A A 8.00-V battery is connected across the terminals A and B for the group of resistors shown in (Figure 1). The resistors have values of R1-45 , R2-34 . R3 = 71 . What is the potential difference across resistor R1? Express your answer to two significant figures and include appropriate units. Value Units Submit My Answers Give Up Part B What is the potential difference across resistor R2? Express your answer to two significant figures and include appropriate units. 2.6 V Submit My Answers Give Up Figure 1 #ofl Correct Part C What is the potential difference across resistor R3? Express your answer to two significant figures and include appropriate units.

Explanation / Answer

a) R2 and R3 are in series = 34 + 71 = 105 ohms

Req = 1 / [1/105 + 1/45] = 31.5 ohms

I = 8 / (34 + 71) = 0.076 A

potential difference across R1, V1 = 8 V

b) potential difference across R2 = I R2 = 0.076 * 34 = 2.59 V

c) potential difference across R3 = I R3 = 0.076 * 71 = 5.4 V

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