Electric Fields - electric potential and work done Flashcards
Define an Elastic Collision
- When a collision results in NO LOSS in kinetic energy
Define an Inelastic Collision
- When a collision results in a LOSS in kinetic energy and a GAIN in thermal or internal energy
As you go further from the centre of the charge ….
…. the strength of the charge will decrease.
If you move a bigger mass or charge in an electric field, … (energy)
… the energy change will be larger too due to the Work done to the mass/charge.
Q1 / Q2 stand for …
… the charges inducing a force on each other.
r stands for …
… r stands for the radius from the centre of the source of the charge.
k stands for the …
… constant.
Where is there the least Electric Potential in an electric field when there are two charges (positive and negative) in a region of space, both having the same electric field coverage/radius and you are a positive charge?
Why?
Nearest to the negative charge.
Because (from a positive charge) you only need a small amount of work done to it, to move it away from the + and towards the - .
Where is there the most Electric Potential in an electric field if you are a positive charge?
Why?
Nearest to the positive charge.
Because (from a positive charge) you need a large amount of work done to it, to move it away from the - and towards the + (they repel each other) .
V stands for …
… electric potential.
F stands for …
… electrostatic force.
Unit for V
V or JC^-1
Unit for F
N
Unit for r
m
Unit for Q
C
Unit for E
Vm^-1 or NC^-1
EPE is the … supplied to the charges.
… energy …
In a gravitational field, if an object is moved along an equipotential line, … .
… it doesn’t “do work” against the field (assuming no friction).
W stands for …
… work done.
Unit for W
J
How do you find how close a proton gets towards another proton before being repelled?
↓KE = ↑Potential Energy
1/2 m v^2 = F (idk why)
1/2 m v^2 = k Q1 Q2 / r
k Q1 Q2 / 1/2 m v^2 = r
