1) A silver wire has a resistance of 4.7 at 20C. What resistance does it have at

Question

1) A silver wire has a resistance of 4.7 at 20C. What resistance does it have at 43C? Use a temperature coefficient of resistivity of 0.0038 (C)1. Neglect any change in length or cross-sectional area resulting from the tem- perature change. Answer in units of .
2) A total charge of 8.1 mC passes through a cross-sectional area of a wire in 3.2 s . What is the current in the wire? Answer in units of mA. 012 10.0 points A silver wire has a resistance of 4.7 at 20°C What resistance does it have at 43 °C? Use a temperature coefficient of resistivity of 0.0038 (°C)1. Neglect any change in length or cross-sectional area resulting from the tem perature change. Answer in units of 013 10.0 points A total charge of 8.1 mC passes through a cross-sectional area of a wire in 3.2 s What is the current in the wire? Answer in units of mA

Explanation / Answer

R= Ro(1+0.0038t)

R= 4.7(1+0.0038×23)

R= 5.11078 ohm

I= Q/T

I = 8.1/3.2

I= 2.53 mA

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