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electromagnetism - Coggle Diagram
electromagnetism
charged particles, conductor E & B fields: what happens to stationary and moving charged particles when they interact with an electric or magnetic field
parallel charged plates: constant E field, lines enter perpendicular, E = V/d
acceleration of charged particles by the electric field: F=ma=qE --> equating these can find acceleration
work done on the charge: W=qV=qEd, K=1/2mv^2 --> work is done whenever a charged object moves inside an electfic field...if charge moving against E work is done onto field...change in KE = work
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the motor effect: what circumstances is a force produced on a current-carrying conductor in a magnetic field
when a current carrying conductor moves into a magnetic field it experiences a force --> a moving charge that is not accelerating produces a magnetic field
the magnetic field interacts with the exrternal mnagnetic field of the conductor which induces a resutlant force
--> max F when wire perpendicular to field
--> min F = 0 when parallel to field
F=Bilsin --> use RHPR for direction
the B field produced by current carruingh conductor --> use RHGR --> thumb = conventional current
interaction between parallel current carrying wires
if 2 wires parallel there is a force experienced by noth
- this is due to the magnetic fields produced by the individual wires interacting with one another
- F/l = uii/2pir
- same direction --> attractive
- opp direction --> repulsive
- when calculating do individual and +/- depending on whether attractive or repulsive
ampere: the amount of current needed through 2 parallel indentical conductors of infinite length when they are 1m apart to produce a force of 2x10^-7N per unit metre
This is an application of Newton's Third Law of Motion, which states: In a two-body system, if body A exerts a force on body B, then body B exerts a force on body A that is equal in magnitude, but opposite in direction.
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applications of the motor effect: how has knowledge about the motor effect been applied to technological advances