Extended Response
19.1 Ohm's law
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Current is the ratio of charge passing through a conductor per unit time. The current’s direction is the direction in which protons would flow.
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Charge is the ratio of current passing through a conductor per unit time. The charge’s direction is the direction in which protons would flow.
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Current is the product of charge passing through a conductor and the amount of time that passes. The current’s direction is the direction in which electrons would flow.
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Charge is the product of current passing through a conductor and time. The charge’s direction is the direction in which electrons would flow.
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If the amount of current flowing through the material is too low, the resistor may heat up, creating a nonlinear relationship between current and voltage.
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If the amount of current flowing though the material is too high, the resistor may heat up, creating a nonlinear relationship between current and voltage.
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If the amount of current flowing through the material is too low, the resistor may not warm up enough to allow a nonlinear relationship between current and voltage.
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If the amount of current flowing through the material is too high, the resistor may not warm up enough to allow a nonlinear relationship between current and voltage.
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\frac{R}{10}
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5\,\text{R}
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\frac{10}{R}
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10\,\text{R}
19.2 Series Circuits
Explain why the current is the same at all points in the circuit below.
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If the current were not constant, the mobile charges would bunch up in places, which means that the voltage would decrease at that point. A lower voltage at some point would push the current in the direction that further decreases the voltage.
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If the current were not constant, the mobile charges would bunch up in places, which means that the voltage would increase at that point. But a higher voltage at some point would push the current in the direction that decreases the voltage.
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If the current were not constant, the mobile charges would bunch up in places, which mean that the voltage would increase at that point. A higher voltage at some point would push the current in the direction that further increases the voltage.
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If the current were not constant, the mobile charges would bunch up in places, which mean that the voltage would decrease at that point. But a lower voltage at some point would push the current in the direction that increases the voltage.
What is the current through each resistor in the circuit?
- Current through resistors R1, R2, R3, and R4 is 0.48 A, 0.30 A, 1.2 A, and 0.24 A, respectively.
- Current through resistors R1, R2, R3, and R4 is 1200 A, 1920 A, 480 A, and 2400 A, respectively.
- Current through resistors R1, R2, R3, and is R4 2.08 A, 3.34 A, 0.833 A, and 4.17 A, respectively.
- The same amount of current, 0.096 A, flows through all of the resistors.
19.3 Parallel Circuits
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All outlets on the circuit have the same voltage because they are wired in parallel.
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All outlets on the circuit have the same voltage because they are wired in series.
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Outlets further away from the source have a lower voltage because they are wired in parallel.
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Outlets further away from the source have a lower voltage because they are wired in series.
19.4 Electric Power
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No, the power dissipated remain same.
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Yes, the power dissipated increases.
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Yes, the power dissipated decreases.
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Batteries are connected in series for higher voltage and power output.
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Batteries are connected in series for lower voltage and power output.
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Batteries are connected in series so that power output is a much lower for the same amount of voltage.
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Batteries are connected in series to reduce the overall loss of energy from the circuit.