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Module 1 Electric Current. Electrons, Photons & Waves. Explain that electric current is a net flow of charged particles. Explain that electric current in a metal is due to the movement of electrons, whereas in an electrolyte the current is due to the movement of ions. - PowerPoint PPT Presentation
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Electrons, Photons & Waves
•Explain that electric current is a net flow of charged particles.
•Explain that electric current in a metal is due to the movement of
electrons, whereas in an electrolyte the current is due to the movement
of ions.
•Explain what is meant by conventional current and electron flow.
•Select and use the equation ΔQ = IΔt.
•Define the coulomb.
Module 1 Electric Current
Electrons, Photons & WavesModule 1 Electric Current
Electrons, Photons & WavesModule 1 Electric Current
Electrons, Photons & WavesModule 1 Electric Current
Electrons, Photons & WavesModule 1 Electric Current
Q = I x t
Electrons, Photons & WavesModule 1 Electric Current
The Coulomb One coulomb is the total charge supplied by a current of one ampere in a time of one second.
Electrons, Photons & WavesModule 1 Electric Current
•Recall and use the elementary charge e = 1.6 × 10-19 C.•Describe Kirchhoff’s first law and appreciate that this is a consequence of conservation of charge.•State what is meant by the term mean drift velocity of charge carriers.•Select and use the equation I = Anev.•Describe the difference between conductors, semiconductors and insulators in terms of the number density n.
Series Circuits
A1
A3
A2
V1 V2
Same Value Resistors
Electrons, Photons & Waves
Series Circuits
A1
A3
A2
V1 V2
Different Value Resistors
Parallel Circuits
A3
A2
A1
V1
Same Value Resistors
V2
Parallel Circuits
A3
A2
A1
V1
Different Value Resistors
V2
Drift Velocity
• state what is meant by the term mean drift velocity of charge carriers;• select and use the equation I = Anev;• describe the difference between conductors, semiconductors and insulators in terms of the number density n.
Drift Velocity
Drift Velocity
The mean drift velocity is the average displacement travelled by the electrons along the wire per second;
I = Anev
Drift Velocity I = Anev