QUESTION What happens to the drift speed of the electrons as the temperature rises? (Select all that apply.) It becomes larger, so that the resistance decreases and current increases. It remains the same. It becomes smaller because the atoms of the metal vibrate more strongly and interfere more with electron drift motion. O It becomes larger because the electrons become more energetic and move faster. It becomes smaller, so that the resistance increases and current decreases. PRACTICE IT Use the worked example above to help you solve this problem. A resistance thermometer, which measures temperature by measuring the change in resistance of a conductor, is made of platinum and has a resistance of 50.0 2 at 20.0°C. (a) When the device is immersed in a vessel containing melting indium, its resistance increases to 76.8 2. From this information, find the melting point of indium. °C (b) The indium is heated further until it reaches a temperature of 220°C. What is the ratio of the new current in the platinum to the current Imp at the melting point?

QUESTION What happens to the drift speed of the electrons as the temperature rises? (Select all that apply.) It becomes larger, so that the resistance decreases and current increases. It remains the same. It becomes smaller because the atoms of the metal vibrate more strongly and interfere more with electron drift motion. O It becomes larger because the electrons become more energetic and move faster. It becomes smaller, so that the resistance increases and current decreases. PRACTICE IT Use the worked example above to help you solve this problem. A resistance thermometer, which measures temperature by measuring the change in resistance of a conductor, is made of platinum and has a resistance of 50.0 2 at 20.0°C. (a) When the device is immersed in a vessel containing melting indium, its resistance increases to 76.8 2. From this information, find the melting point of indium. °C (b) The indium is heated further until it reaches a temperature of 220°C. What is the ratio of the new current in the platinum to the current Imp at the melting point?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

REMARKS The answer to part (b) is only an estimate because the temperature coefficient is, in fact,
temperature dependent. As the temperature rises, both the rms speed of the electrons in the metal and
the resistance increase.
QUESTION What happens to the drift speed of the electrons as the temperature rises? (Select all that
apply.)
It becomes larger, so that the resistance decreases and current increases.
It remains the same.
It becomes smaller because the atoms of the metal vibrate more strongly and interfere more with
electron drift motion.
It becomes larger because the electrons become more energetic and move faster.
It becomes smaller, so that the resistance increases and current decreases.
PRACTICE IT
Use the worked example above to help you solve this problem. A resistance thermometer, which
measures temperature by measuring the change in resistance of a conductor, is made of platinum and has
a resistance of 50.0 2 at 20.0°C.
(a) When the device is immersed in a vessel containing melting indium, its resistance increases to
76.8 . From this information, find the melting point of indium.
°C
(b) The indium is heated further until it reaches a temperature of 220°C. What is the ratio of the
new current in the platinum to the current Imp at the melting point?

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