A pair of closely spaced platinum discs in a vacuum tube are connected to a DC power supply and an ammeter, as shown below. When a beam of 102.5-nm UV light shines on left-hand "target" disc, a current flows through the ammeter. You decrease the potential difference provided by the DC power supply until the current stops flowing. This occurs when the right-hand "collector" disc is 5.75 V lower than the left-hand "target" disc.
A pair of closely spaced platinum discs in a vacuum tube are connected to a DC power supply and an ammeter, as shown below. When a beam of 102.5-nm UV light shines on left-hand "target" disc, a current flows through the ammeter. You decrease the potential difference provided by the DC power supply until the current stops flowing. This occurs when the right-hand "collector" disc is 5.75 V lower than the left-hand "target" disc.
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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O (c) Bwl/v
O (d) Bv/(Iw)
O (e) BI/vw
O (f) None of these are correct.
Question 30
A pair of closely spaced platinum discs in a vacuum tube are connected to a DC power supply and an
ammeter, as shown below. When a beam of 102.5-nm UV light shines on left-hand "target" disc, a
current flows through the ammeter. You decrease the potential difference provided by the DC
power supply until the current stops flowing. This occurs when the right-hand "collector" disc is 5.75
V lower than the left-hand "target" disc.
AV
What is minimum amount of energy needed to eject a single electron from platinum?
O (a) 1.91 eV
O (b) 4.45 eV
O (c) 6.35 eV
O (d) 7.62 eV
O (e) None of these is even approximately correct.
Question 31
A
1 pts
1 pts
A pair of closely spaced platinum discs in a vacuum tube are connected to a DC power supply and an
AUG 6
12
F
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