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Chapter 17: 24P (page 673)

The electron current in a horizontal metal wire is3.7×1018electrons, and the electrons are moving to the right. What are the magnitude and direction of the conventional current?

Short Answer

Expert verified

0.6 A, towards left

Step by step solution

01

Given Data

Electron current =3.7×1018electron/s

02

Formula used

Electron passing through the wire per second is the electron current i

i=1q

Where, I is Conventional current

03

Calculation of conventional current

I=iq=3.7×1018-1.6×10-19=0.6A

Direction of the conventional current is towards left.

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Most popular questions from this chapter

In a circuit consisting of a long bulb and two flashlight batteries in series the conventional current is about 0.1 A. What is the magnetic field 5 mm from the wire? (This is about how far away the compass needle is when you place the Wire on top Of the compass) Is this a big or a small field?

A current-carrying wire oriented north-south and laid over a compass deflects the compass 150east. What are the magnitude and direction of the magnetic field made by the current? The horizontal component of Earth’s magnetic field is about 2×10-5T .

You have used copper wires in your circuits. Let’s calculate the mobile electron density n for copper. A mole of copper has a mass of 64g (0.064kg), and one mobile electron is released by each atom in metallic copper. The density of copper is about 9g/cm3or(9×103kg/m3). Show that the number of mobile electrons per cubic meter in copper is 8.4×1028m-3.

A straight wire of length 0.62 m carries a conventional current of 0.8 A. What is the magnitude of the magnetic field made by the current at a location that is a perpendicular distance 2.9cm from the center of the wire? Use both the exact equation and the approximate equation to calculate the field.

If 1.8×1016 electrons enter a light bulb in 3ms, what is the magnitude of the electron current at the point in the circuit? If the electron current at a particular location is a circuit is 9×1018 electrons/s, how many electrons pass that point in 10min ?
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