Edited Invalid date
19.4 Equipotential Lines
The potential on the surface is the same as the point charge at the center of the sphere.
The charge is small, but it produces a large amount of power.
It is difficult to store isolated charges.
A meter can be used to compare the measured potential with the ground potential.
The ground potential is often taken to be zero.
It is the potential difference between two points that is important, and often there is a tacit assumption that a distant point is not worth much.
In Electric Potential Energy: Potential Difference, it is noted that this is similar to taking sea level.
We can draw pictures to show electric fields, just as we can show electric potentials.
The two are related.
Figure 19.8 shows an isolated positive point charge and electric field lines.
The electric field lines can be positive or negative.
We use blue arrows to represent the magnitude and direction of the electric field, but we also use green lines to represent places where the electric potential is constant.
An equipotential line or surface is referred to as a noun by the term equipotential.
The potential for a point charge is the same anywhere in the world.
This is true since the potential for a point charge is given by and, thus, has the same value at any point that is a given distance from the charge.
The equipotential lines are parallel to the electric field lines.
No work is required to move a charge along one of the lines because the potential is the same.
In every case, equipotential lines are parallel to electric field lines.
Equipotential lines are always parallel to electric field lines.
No work is required to move a charge along an equipotential.
Work is zero if force is not moving in a straight line.
The motion along an equipotential must be in the same direction as the force.
The magnitudes of the electric field strength and force are represented by the above equation.
It must be 0 if neither nor nor is zero.
Motion along an equipotential is related to.
One of the rules for conductors and static electric fields is that the electric field must be parallel to the conductor's surface.
In static situations, a conductor is an equipotential surface.
There is no difference between the surface of a conductor and the ground.
A useful safety tool is grounding.
The metal case of the electrical appliance needs to be grounded to make sure that it is zero volts relative to the earth.
A conductor can be fixed by connecting it to the earth with a good conductor.
A conductor can replace any surface that is equipotential.
The electric field and equipotential lines are shown.
The equipotential lines can be drawn by making them parallel to the electric field lines.
If the electric field lines are known, the equipotential lines can be drawn.
The potential is greatest near the positive charge and the least near the negative charge.
There are two equal negative charges in these fields.
The equipotentials are parallel between the plates.
Plates could be placed at the equipotential lines to maintain the field.
Electric fields and equipotential lines can be applied to the heart.
The heart is powered by electrical signals.
The chambers of the heart contract and relax when electrical signals are moved.
The movement of electrical signals can be disturbed when a person has a heart attack.
The rhythm of electrical signals can be initiated with the use of a device.
The equipotential lines around the heart, the thoracic region, and the axis of the heart are useful ways of monitoring the structure and functions of the heart.
The small electric signals being generated during the activity of the heart are measured by an electrocardiogram.
Energy Stored in Capacitors discusses the relationship between electric fields and the heart.
You can view the electric field, voltages, equipotential lines, and more by moving the point around on the field.
Review flashcards and saved quizzes
Getting your flashcards
Privacy & Terms