Chapter 8.4 Electric Potential
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What is the potential energy of a charged object based on?
An object has gravitational potential energy because of its location in a gravitational field
What is required to push a charged particle against the electric field of a charged body?
Work
What does work change in regard to a charged particle?
Work changes the electric potential energy of the charged particle. The work done in pushing a charged particle closer to the charged sphere increases the potential energy of the charged particle.
What is Electric Potential Energy?
The energy possessed by the charged particle that is due to its location
If a particle is released, it accelerates in a direction away from the sphere and it’s electric potential energy changes to what?
Kinetic Energy
If you push on a particle with twice the charge, do you do twice the work?
yes
Does Twice the charge in the same location have twice the electric potential energy?
Yes
You should consider electric potential energy per what?
Consider electric potential energy per charge
What is Electric Potential?
Divide the amount of electric potential energy by the amount of charge It’s the concept of potential energy per charge It’s often called Voltage
What is the unit of measurement for electric potential
The Volt (voltage) Voltage and Electric Potential can be used interchangeably
Are Electric Potential and Potential the same thing?
Yes They mean electric potential energy per unit charge (in volts)
Potential difference is the same as what?
Voltage They are the difference in electric potential between two points (also in volts)
What’s the different between Electric Potential Energy and Electric Potential (or Voltage)?
Electric Potential Energy is the amount of energy needed to move a charge against an electric field. Electric Potential (Voltage) is the difference in potential energy per unit charge between two locations in an electric field
Increased Potential Energy is the result of what?
Work Input
High Voltage at low energy is similar to what?
The Harmless high-temperature sparks emitted by a sparkler because temp is average kinetic energy per molecule, which means that total energy is a lot only for lots of molecules
High Voltage correlates with a lot of energy only when…
High voltage means a lot of energy only for lots of charge