Question

(2 pt) Which statement(s) is(are) true? When a long straight conducting wire of constant cross-section is connected to the terminals of a battery, the electric field A. lines are uniform ly distributed over the cross-section al area of the con- ductor. B. inside the wire is of constant magnitude and its direction is parallel to the wire. C. both of the above D. neither of the above 2 pt) Which statement(s) is(are) true? Ohm's law A. asserts that the current in a conducting wire is proportional to the resistance of the wire. B. is a general law of nature like Newton's laws and Gauss' law C. describes the electrical properties of D. all of the above E. two of the above some conducting materials. (2 pt) Which term was not defined in the reading assignment? A. drift velocit B. impedance C. superconductivity D. resistivity

Answer 1

Q. No: 1 Option C When a long straight wire is connected to the battery of positive and negative terminals then we know that electric field flows from positive terminal to negative terminals and is uniformly distributed over the cross-sectional area of the conductor and the direction of the electric field is parallel to the wire. Q. No: 2 Option C-Describes the electrical properties of some conducting materials. We know that from the ohm's law, the current flowing the circuit is directly proportional to the potential difference applied across it. Ιαν This law is only applicable for conductors because with the increase of temperature resistance increases, it will not be applicable for semiconductors. Therefore, it describes the electrical properties of some conducting materials.

Q. No: 3 Option C-Superconductivity In reading the assignment, the term which was not defined is the superconductivity. Because the terms drift velocity, impedance and resistivity are the properties of normal conducting material which can be defined. But the term superconductivity is for the materials in which they exhibit zero resistivity at almost very low absolute temperatures.