Similarly up and down are positive and negative, respectively, for the y-direction.Įxample: 2. For example, if you have to walk to the right in x-direction that means rx is positive if you have to walk to the left in x-direction to get from the source to the target rx will be negative. They are defined as how far you have to walk only in x- or y-direction in order to get from the source to the target. We need to be careful about signs when it comes to rx and ry. First you calculates the x- and y-components of the distance from the source to the target (rx and ry), and the magnitude of that distance.
There is a simple strategy that gives us the x- and y-components of electric fields directly rather than having to go through first calculating the magnitude of the electric field: 1. So in order to be able to add the x-components and y-components we obviously first need to know what the x- and y- components are.
#CHECK ANGLE IN ELECTRIC QUILT 8 PLUS#
The way you add vectors is by adding each kind of component separately, that is: Figure: The x-component of the total E-field at certain point is the x-component of E of the first source plus the x-component of E of the second source, and similarly for the y-component. When there are more than one source of an electric field you need to add the electric field vector produced by the one source to the electric field vector produced by the other source. Knowing these two numbers, which can be negative or positive, means we know everything about the vector (if you work in three dimension you will also need the z-component). By the whole vector I mean the x-component and the y-component of the vector. For many problems about electric fields and forces it is important to calculate the whole vector.
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