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Question 1 Part (a) Select all the correct statements about electric current. The electric current in a wire is a flow of electrons, while by convention we think of it as a flow of positive charges in the opposite direction. Question 2 The electric current flowing at a point along a conducting wire is the amount of charge flowing per unit time through the wire's cross-sectional area at that point. The flowing charges forming an electric current can be positive or negative charged particles. The electric current in a wire is a flow of positive charges. An electric current can flow in a wire in the absence of a potential difference along the wire. Part (b) Select all the correct statements. Ohm's law can be written in the form I = RAV. The resistance of a wire depends on the wire's resistivity, length, and cross-sectional area. All wires made of the same material at the same temperature have the same resistance. Ohm's law can be written in the form AV = IR. The resistance of a wire depends only on the resistivity of the wire's material. Part (a) As the temperature of a conductor is lowered, its resistance typically... (select the best choice) Ostays the same O decreases and then increases increases increases and then decreases Odecreases

Question 1 Part (a) Select all the correct statements about electric current. The electric current in a wire is a flow of electrons, while by convention we think of it as a flow of positive charges in the opposite direction. Question 2 The electric current flowing at a point along a conducting wire is the amount of charge flowing per unit time through the wire's cross-sectional area at that point. The flowing charges forming an electric current can be positive or negative charged particles. The electric current in a wire is a flow of positive charges. An electric current can flow in a wire in the absence of a potential difference along the wire. Part (b) Select all the correct statements. Ohm's law can be written in the form I = RAV. The resistance of a wire depends on the wire's resistivity, length, and cross-sectional area. All wires made of the same material at the same temperature have the same resistance. Ohm's law can be written in the form AV = IR. The resistance of a wire depends only on the resistivity of the wire's material. Part (a) As the temperature of a conductor is lowered, its resistance typically... (select the best choice) Ostays the same O decreases and then increases increases increases and then decreases Odecreases

College Physics
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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Question 1 Part (a) Select all the correct statements about electric current. The electric current in a wire is a flow of electrons, while by convention we think of it as a flow of positive charges in the opposite direction. Question 2 The electric current flowing at a point along a conducting wire is the amount of charge flowing per unit time through the wire's cross-sectional area at that point. The flowing charges forming an electric current can be positive or negative charged particles. The electric current in a wire is a flow of positive charges. An electric current can flow in a wire in the absence of a potential difference along the wire. Part (b) Select all the correct statements. Ohm's law can be written in the form I = RAV. The resistance of a wire depends on the wire's resistivity, length, and cross-sectional area. All wires made of the same material at the same temperature have the same resistance. Ohm's law can be written in the form AV = IR. The resistance of a wire depends only on the resistivity of the wire's material. Part (a) As the temperature of a conductor is lowered, its resistance typically... (select the best choice) O increases O increases and then decreases Odecreases Ostays the same O decreases and then increases Part (b) When a current flows through a resistor of resistance R that has a potential difference V across it, the power P of the heat dissipation from the resistor is ... (select the best choice) OVEROVAR ORVOR²N OR/V²
Transcribed Image Text:Question 1 Part (a) Select all the correct statements about electric current. The electric current in a wire is a flow of electrons, while by convention we think of it as a flow of positive charges in the opposite direction. Question 2 The electric current flowing at a point along a conducting wire is the amount of charge flowing per unit time through the wire's cross-sectional area at that point. The flowing charges forming an electric current can be positive or negative charged particles. The electric current in a wire is a flow of positive charges. An electric current can flow in a wire in the absence of a potential difference along the wire. Part (b) Select all the correct statements. Ohm's law can be written in the form I = RAV. The resistance of a wire depends on the wire's resistivity, length, and cross-sectional area. All wires made of the same material at the same temperature have the same resistance. Ohm's law can be written in the form AV = IR. The resistance of a wire depends only on the resistivity of the wire's material. Part (a) As the temperature of a conductor is lowered, its resistance typically... (select the best choice) O increases O increases and then decreases Odecreases Ostays the same O decreases and then increases Part (b) When a current flows through a resistor of resistance R that has a potential difference V across it, the power P of the heat dissipation from the resistor is ... (select the best choice) OVEROVAR ORVOR²N OR/V²
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