Electric Current

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amy.cottom2
Created by amy.cottom2 about 6 years ago
Electric Current
amy.cottom2
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Electric Current
1 Absolute 0 Temp
1.1 Above
1.1.1 Atoms vibrate, liberated electrons
1.2 At 0
1.2.1 Electrons attached to atoms
2 Direction of Flow
2.1 Coneventional
2.1.1 The direction in which + charged particles would flow to the - terminal
2.2 Electron
2.2.1 Electrons are - charged and would attract to the + terminal
3 Electrolyte
3.1 Solution containing - & + ions
4 Coulomb
4.1 The amount of charge that passes a point when a current of 1A flows for 1s
5 1.6 x 10^-19
6 Ammeter
6.1 In series
6.2 Measure Current
7 Kirchhoffs 1st Law
7.1 The sum of currents entering any junction in a circuit is equal to the sum of currents leaving that same junction
7.1.1 This is a consequence of the conversation of charge
8 Flow of Charge
8.1 Net flow of electrically charged particles
8.2 Q= IT
8.3 Current at ALL points of circuit
9 Drift Velocity
9.1 The average velocity with which charge carriers move in the conventional direction. They are attracted to the opposite charge and collide along the way- hence drift
9.2 I=NAVE
9.2.1 A= m^-3 m^2 ms^-1 C
9.3 V proportional to I
9.4 V proportional 1/A
9.5 V proportional 1/n
10 Number Density
10.1 Metals
10.1.1 Heat up= Increases Resistance
10.1.2 High no. density
10.2 Semi Conductors
10.2.1 Heat up= Less resistance
10.2.2 Electrons tightly bound
10.3 Insulators
10.3.1 Low number density