QUESTION In comparing wires of identical shape and carrying the same current but made of different metals, is the drift velocity in each wire inversely proportional to the number density of charge carriers? O No. The drift velocity is directly proportional to the number density of carriers. O Yes. To have the same current from & times as many carriers, it takes 1/4 times the drift speed. No. The drift velocity is the same for all conductors. O Yes. To have the same current from & times as many carriers, it takes & times the drift speed. Use the worked example above to help you solve this problem. The amount of charge that passes through a filament of a certain lightbulb in 2.10 s is 1.53 C. (a) Find the current in the bulb. 729 ✔A (b) Find the number of electrons that pass through the filament in 5.37 s. 9.568E-20 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. electrons (c) If the current is supplied by a 12.0-V battery, what total energy is delivered to the lightbulb filament? 8.748 x Your response differs from the correct answer by more than 10%. Double check your calculations. J

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QUESTION In comparing wires of identical shape and carrying the same current but made of different
metals, is the drift velocity in each wire inversely proportional to the number density of charge carriers?
No. The drift velocity is directly proportional to the number density of carriers.
Yes. To have the same current from & times as many carriers, it takes 1/4 times the drift speed.
No. The drift velocity is the same for all conductors.
Yes. To have the same current from & times as many carriers, it takes & times the drift speed.
Use the worked example above to help you solve this problem. The amount of charge that passes through
a filament of a certain lightbulb in 2.10 s is 1.53 C.
(a) Find the current in the bulb.
729
✔A
(b) Find the number of electrons that pass through the filament in 5.37 s.
9.568E-20 X
Your response differs significantly from the correct answer. Rework your solution from the
beginning and check each step carefully. electrons
(c) If the current is supplied by a 12.0-V battery, what total energy is delivered to the lightbulb
filament?
8.748
Your response differs from the correct answer by more than 10%. Double check your calculations.
J
Transcribed Image Text:QUESTION In comparing wires of identical shape and carrying the same current but made of different metals, is the drift velocity in each wire inversely proportional to the number density of charge carriers? No. The drift velocity is directly proportional to the number density of carriers. Yes. To have the same current from & times as many carriers, it takes 1/4 times the drift speed. No. The drift velocity is the same for all conductors. Yes. To have the same current from & times as many carriers, it takes & times the drift speed. Use the worked example above to help you solve this problem. The amount of charge that passes through a filament of a certain lightbulb in 2.10 s is 1.53 C. (a) Find the current in the bulb. 729 ✔A (b) Find the number of electrons that pass through the filament in 5.37 s. 9.568E-20 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. electrons (c) If the current is supplied by a 12.0-V battery, what total energy is delivered to the lightbulb filament? 8.748 Your response differs from the correct answer by more than 10%. Double check your calculations. J
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