Water doesn't flow in the pipe when both ends (a) are at the same level. Another way of saying this is that water will not flow in the pipe when both ends have the same potential energy (PE). Similarly, charge will not flow in a conductor if both ends of the conductor are the same electric potential. But tip the water pipe, as in (b), and water will flow. Similarly, charge will flow when you increase the electric potential of an electric conductor so there is a potential difference across the ends. a. The unit of electric potential difference is [volt] [ampere] [ohm] [watt]. b. It is common to call electric potential difference [voltage] [amperage] [wattage]. c. The flow of electric charge is called electric [voltage] [current] [power] and is measured in [volts] [amperes] [ohms] [watts].
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Textbook Solutions for Practicing Physics for Conceptual Physics
Question
a. A current of 1 ampere is a flow of charge at the rate of 1. Water doesn't flow in the pipe when both ends (a) are at the same level. Another way of saying this is that water will not flow in the pipe when both ends have the same potential energy (PE). Similarly, charge will not flow in a conductor if both ends of the conductor are the same electric potential. But tip the water pipe, as in (b), and water will flow. Similarly, charge will flow when you increase the electric potential of an electric conductor so there is a potential difference across the ends. b. When a charge of 15 C flows through any area in a circuit each second, the current is A. coulomb per second. coulomb of charge between the two points. c. One volt is the potential difference between two points if 1 joule of energy is needed to move d. When a lamp is plugged into a 120-V socket, each coulomb of charge that flows in the circuit is raised to a potential .energy of joules. e. Which offers more resistance to water flow, a wide pipe or a narrow pipe? Similarly, which offers more resistance to the flow of charge, a thick wire or a thin wire?
Solution
The first step in solving 23 problem number 2 trying to solve the problem we have to refer to the textbook question: a. A current of 1 ampere is a flow of charge at the rate of 1. Water doesn't flow in the pipe when both ends (a) are at the same level. Another way of saying this is that water will not flow in the pipe when both ends have the same potential energy (PE). Similarly, charge will not flow in a conductor if both ends of the conductor are the same electric potential. But tip the water pipe, as in (b), and water will flow. Similarly, charge will flow when you increase the electric potential of an electric conductor so there is a potential difference across the ends. b. When a charge of 15 C flows through any area in a circuit each second, the current is A. coulomb per second. coulomb of charge between the two points. c. One volt is the potential difference between two points if 1 joule of energy is needed to move d. When a lamp is plugged into a 120-V socket, each coulomb of charge that flows in the circuit is raised to a potential .energy of joules. e. Which offers more resistance to water flow, a wide pipe or a narrow pipe? Similarly, which offers more resistance to the flow of charge, a thick wire or a thin wire?
From the textbook chapter Electric Current you will find a few key concepts needed to solve this.
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full solution
a. A current of 1 ampere is a flow of charge at the rate of 1. Water doesn't flow in the
Chapter 23 textbook questions
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Chapter 0: Problem 1 Practicing Physics for Conceptual Physics 10
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Chapter 0: Problem 2 Practicing Physics for Conceptual Physics 10
a. A current of 1 ampere is a flow of charge at the rate of 1. Water doesn't flow in the pipe when both ends (a) are at the same level. Another way of saying this is that water will not flow in the pipe when both ends have the same potential energy (PE). Similarly, charge will not flow in a conductor if both ends of the conductor are the same electric potential. But tip the water pipe, as in (b), and water will flow. Similarly, charge will flow when you increase the electric potential of an electric conductor so there is a potential difference across the ends. b. When a charge of 15 C flows through any area in a circuit each second, the current is A. coulomb per second. coulomb of charge between the two points. c. One volt is the potential difference between two points if 1 joule of energy is needed to move d. When a lamp is plugged into a 120-V socket, each coulomb of charge that flows in the circuit is raised to a potential .energy of joules. e. Which offers more resistance to water flow, a wide pipe or a narrow pipe? Similarly, which offers more resistance to the flow of charge, a thick wire or a thin wire?
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Chapter 0: Problem 3 Practicing Physics for Conceptual Physics 10
The resistance of the side lights on an automobile are 10 ohms. How much current flows in them when connected to 12 volts?
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Chapter 0: Problem 4 Practicing Physics for Conceptual Physics 10
What is the current in the 30-ohm heating coil of a coffee maker that operates on a 120-volt circuit?
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Chapter 0: Problem 5 Practicing Physics for Conceptual Physics 10
During a lie detector test, a voltage of 6 V is impressed across two fingers. When a certain question is asked, the resistance between the fingers drops from 400,000 ohms to 200,000 ohms. a. What is the current initially through the fingers? b. What is the current through the fingers when the resistance between them drops?
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Chapter 0: Problem 6 Practicing Physics for Conceptual Physics 10
How much resistance allows an impressed voltage of 6 V to produce a current of 0.006 A?
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Chapter 0: Problem 7 Practicing Physics for Conceptual Physics 10
What is the resistance of a clothes iron that draws a current of 12 A at 120 V?
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Chapter 0: Problem 8 Practicing Physics for Conceptual Physics 10
What is the voltage across a 1OO-ohm circuit element that draws a current of 1 A?
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Chapter 0: Problem 9 Practicing Physics for Conceptual Physics 10
What voltage will produce 3 A through a 15-ohm resistor?
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Chapter 0: Problem 10 Practicing Physics for Conceptual Physics 10
The current In an incandescent lamp is 0.5 A when connected to a 120-V circuit, and ~ 0.2 A when connected to a 10-V source. Does the resistance of the lamp change in these cases? Explain your answer and defend it with numerical values.
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