Suppose that we have 2.10 X 10 doubly charged positive ions per cubic centimeter, all moving north with a speed of 1.40 X 10' m/s. (a) Calculate the current density, in magni- tude and direction. (b) Can you calculate the total current in this ion beam? If not, what additional information is needed?

Suppose that we have 2.10 X 10 doubly charged positive ions per cubic centimeter, all moving north with a speed of 1.40 X 10' m/s. (a) Calculate the current density, in magni- tude and direction. (b) Can you calculate the total current in this ion beam? If not, what additional information is needed?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 29P: The current of an election beam has a measuredcurrent of I=50.00A with a radius of 1.00 mm2. What is...

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Concept explainers

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

3. Suppose that we have 2.10 X 10* doubly charged positive
ions per cubic centimeter, all moving north with a speed of
1.40 X 10 m/s. (a) Calculate the current density, in magni-
tude and direction. (b) Can you calculate the total current in
this ion beam? If not, what additional information is
needed?

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