18 16 14 12 2 05 00 6 4. Potential Difference (V)

College Physics
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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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c. What is the resistance of the lamp when the current is 0.2 A?
d. What is the current when the potential difference across the lamp is 1.2 V?
e. What is the resistance of the lamp when the potential difference across the lamp is 1.2 V?
f. What is the potential difference when the current is 2.4 A?
g. What is the resistance when the current is 2.4 A?
h. What do the values calculated in c), e) and g) suggest about how the resistance of the lamp
is affected by the current? What causes this?
Transcribed Image Text:c. What is the resistance of the lamp when the current is 0.2 A? d. What is the current when the potential difference across the lamp is 1.2 V? e. What is the resistance of the lamp when the potential difference across the lamp is 1.2 V? f. What is the potential difference when the current is 2.4 A? g. What is the resistance when the current is 2.4 A? h. What do the values calculated in c), e) and g) suggest about how the resistance of the lamp is affected by the current? What causes this?
8. A student is investigating how the resistance of a lamp changes with the amount of current
flowing through it. The following equipment is available: wires, a 12 V battery, a variable
resistor, a filament lamp, an ammeter and a voltmeter.
a. How could these components be used to take measurements of the potential difference
across the lamp for different currents? Use a circuit diagram in your explanation
The student's results are show in the graph below.
Voltage - Current Graph for a Filament Bulb
18
16
14
12
10
8
4
2
0.5
1
1.5
2
2.5
Current (A)
b. What is the potential difference across the lamp when the current is 0.2 A?
Potential Difference (V)
Transcribed Image Text:8. A student is investigating how the resistance of a lamp changes with the amount of current flowing through it. The following equipment is available: wires, a 12 V battery, a variable resistor, a filament lamp, an ammeter and a voltmeter. a. How could these components be used to take measurements of the potential difference across the lamp for different currents? Use a circuit diagram in your explanation The student's results are show in the graph below. Voltage - Current Graph for a Filament Bulb 18 16 14 12 10 8 4 2 0.5 1 1.5 2 2.5 Current (A) b. What is the potential difference across the lamp when the current is 0.2 A? Potential Difference (V)
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