Unit 3- Electromagnetism Flashcards Preview

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Flashcards in Unit 3- Electromagnetism Deck (12):

whats the charge of a proton/electron?

P= (-)1.6x10^-19


What are the causes of electric fields?

a point charge or a charge moving through a wire.


What direction do electric fields travel in?

The direction a positive charge would move along it, I.E. attracted to negative and repulsive to positive charges.


What is coulombs law?

The electrical force between 2 charged particles is directly proportional to the product of their charges.


Difference between gravitational force and electrical?

Gravitational is always attractive where as electrical can have repulsive or attractive depending on the charges of the particles.


What is electric field strength?

The total force per unit charge E=F/Q or E=KQ/r^2.


What does the potential difference between two parallel plates tell you?

The energy or work required to move 1 coulomb of charge across the field. Work done=QV


How do you derive the equation of E=V/d?

Work done = Fd E=F/Q F=EQ
EQD=QV then E=V/d


What is an electron volt?

a unit of energy equal to the work done on an electron in accelerating it through a potential difference of one volt.


Whats potential energy?

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.


Whats the equation we use for potential energy?

Ep= KQ1Q2/r and is not a inverse square law but instead just an inverse law so we know that they are direct proportional.


What is electric potential?

The energy a coulomb of charge has if placed at a point in an electric field.