Physics, 22.04.2020 03:47 joThompson

A student is given three wires that are made from different materials, but each wire has the same physical dimensions. For a given experiment, both ends of one wire are connected to a constant voltage power supply so that a closed circuit is established. The student has access to an ammeter and a voltmeter to make measurements for each wire. Which of the following types of data need to be collected to rank the wires in terms of their resistivity. Justify your selection. A) Use the ammeter to measure the current that flows through each wire, because a larger current that flows through the wire corresponds to a larger resistivity. B) Use the ammeter to measure the current that flows through each wire, because a larger current that flows through the wire corresponds to a smaller resistivity. C) Use the voltmeter to measure the potential difference across the wire, because a larger potential difference corresponds to a larger resistivity. D) Use the voltmeter to measure the potential difference across the wire, because a larger potential difference corresponds to a larger resistivity.

Answers: 3

Show answers

Another question on Physics

Physics, 21.06.2019 14:50

Along, straight wire with 3.0 a current flowing through it produces magnetic field strength 1.0 t at its surface. if the wire has a radius r, where within the wire is the field strength equal to 36.0% of the field strength at the surface of the wire? assume that the current density is uniform throughout the wire

Answers: 2

Answer

Physics, 21.06.2019 17:30

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

Answers: 3

Answer

Physics, 21.06.2019 22:00

Atank holds 1000 gallons of water, which drains from the bottom of the tank in half an hour. the values in the table show the volume v of water remaining in the tank (in gallons) after t minutes.t(min) 5 10 15 20 25 30v(gal) 694 444 250 111 28 0(a) if p is the point (15, 250) on the graph of v, find the slopes of the secant lines pq when q is the point on the graph with t = 5, 10, 20, 25, and 30.(b) estimate the slope of the tangent line at p by averaging the slopes of two secant lines.(c) use a graph of the function to estimate the slope of the tangent line at p. (this slope represents the rate at which the water is flowing from the tank after 15 minutes.)show all steps.

Answers: 2

Answer

Physics, 22.06.2019 12:10

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)

Answers: 1

Answer

You know the right answer?

A student is given three wires that are made from different materials, but each wire has the same ph...

Questions