Two cables of the same length are made of the same material, except that one cable has twice the diameter of the other cable. When the same potential difference is maintained across both cables, which of the following statements are true? O The current in the thin cable is four times as great as the current in the thick cable. O The electrons have the same drift velocity in both cables. O The current in the thin cable is twice as great as the current in the thick cable. O The same current flows through both cables. O None of the given choices

Two cables of the same length are made of the same material, except that one cable has twice the diameter of the other cable. When the same potential difference is maintained across both cables, which of the following statements are true? O The current in the thin cable is four times as great as the current in the thick cable. O The electrons have the same drift velocity in both cables. O The current in the thin cable is twice as great as the current in the thick cable. O The same current flows through both cables. O None of the given choices

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 3P: The quantity of charge q (in coulombs) that has passed through a surface of area 2.00 cm2 varies...

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Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

Two cables of the same length are made of the same material, except that
one cable has twice the diameter of the other cable. When the same
potential difference is maintained across both cables, which of the
following statements are true?
O The current in the thin cable is four times as great as the current in the thick
cable.
O The electrons have the same drift velocity in both cables.
O The current in the thin cable is twice as great as the current in the thick cable.
O The same current flows through both cables.
O None of the given choices

A certain fuse "blows" if the current in it exceeds 1.0 A. This fuse melts
with a current density of 690 A/cm2. What is the diameter of the wire in
the fuse?
0.86 mm
0.43 mm
0.59 mm
none of the given choices
0.64 mm

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