Unit 3- Electromagnetism Flashcards Preview

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Flashcards in Unit 3- Electromagnetism Deck (12):
1

whats the charge of a proton/electron?

P= (-)1.6x10^-19

2

What are the causes of electric fields?

a point charge or a charge moving through a wire.

3

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.

4

What is coulombs law?

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

5

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.

6

What is electric field strength?

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

7

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

8

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

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

9

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.

10

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.

11

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.

12

What is electric potential?

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