# In the scenarios listed below, find the direction of the force (if any) that will act on the...

## Question:

In the scenarios listed below, find the direction of the force (if any) that will act on the charge in each of the following situations.

A positive charge within an electric field that points upward._

A negative charge within an electric field that points to the right._

A positive charge moving to the right in a magnetic field that points out of the screen._

A negative charge moving upward in a magnetic field that points into the screen._

A positive charge moving to the right in an electric field that points out of the screen._

A positive charge moving downward in a magnetic field that points upward._

out of the screen

zero force

downward

upward

into the screen

to the right

to the left

## Lorentz Force

The force acting on a charge {eq}q {/eq} in an electric field {eq}\vec E {/eq} or magnetic field {eq}\vec B {/eq} is named after the Dutch physicist Hendrik Lorentz. A magnetic field is acting on moving charges (velocity {eq}\vec v {/eq}, mass {eq}m {/eq}) and an electric field is acting on any charge, moving or not. The force is given by $$\vec F = q \, \vec E + q \, \vec v \times \vec B~.$$

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A positive charge within an electric field that points upward._ upward

A negative charge within an electric field that points to the right._ to the...

The Lorentz Force Law

from

Chapter 23 / Lesson 8
12K

Electric and magnetic fields are both capable of creating forces on charged particles. In this lesson you'll learn how these two forces are related through the Lorentz force law.