PREFINAL

Introduction to Magnetism ,[object Object],[object Object],[object Object],[object Object],[object Object]

Magnetic field of magnets ,[object Object],[object Object],N S N S N S Bar Magnet Horseshoe Magnet C-shaped Magnet

continuation: ,[object Object],[object Object]

continuation: N S Magnetic field Magnetic field

Rules in drawing magnetic field lines ,[object Object],[object Object],[object Object]

Polarity of Magnet ,[object Object],[object Object],[object Object]

continuation: N N N S S S N N N S S S REPULSION REPULSION ATTRACTION

Definition of Magnetic Field ,[object Object],[object Object],Where: F = Magnetic force (Newton) q = charge (coulomb) v = velocity (m/s) β = Magnetic field (Tesla)

continuation: ,[object Object],[object Object],Where: θ is the angle between velocity and magnetic field.

Right-hand-rule: ,[object Object],[object Object],[object Object],[object Object]

continuation: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Sample Problem: ,[object Object]

Magnetic Force ,[object Object],[object Object],[object Object],Where: F = magnetic force (Newton) I = current (ampere) L = Length of the conductor inside the magnetic field (meter) β = Magnetic field (Tesla)

continuation: ,[object Object],[object Object],Where: θ = is the angle between the wire and the magnetic field.

Magnetic field of Earth ,[object Object],[object Object],[object Object]

continuation: ,[object Object],[object Object],[object Object],[object Object]

Conductors with Current ,[object Object],[object Object],[object Object]

Straight Conductor ,[object Object],β I Conductor

Single-Loop Conductor ,[object Object],[object Object]

continuation: ,[object Object],I β

Solinoid ,[object Object],[object Object],[object Object]

[object Object],continuation: C

[object Object],[object Object],continuation:

Moving Charged Particles ,[object Object],[object Object],+ - Positive charge : Use Right-Hand-Rule Negative charge : Use Left-Hand-Rule

[object Object],[object Object],[object Object],continuation: E 1 E 2 E 3 + + + + + + E 1 E 2 E 3

Calculating the Magnetic Field ,[object Object],[object Object],[object Object],r d β I dl

continuation: ,[object Object],r I dl

continuation: ,[object Object],[object Object],I β r

[object Object],[object Object],continuation: R r Outside Inside I β

[object Object],[object Object],continuation: I r Ø

continuation: Complete circular loop I I r

continuation: ,[object Object],z r I

continuation: ,[object Object],[object Object],[object Object],N

Parallel Current ,[object Object],[object Object],[object Object],[object Object]

continuation: ,[object Object],L I a I b d

Sample Problem: ,[object Object],[object Object],[object Object],[object Object]

Magnetic Materials ,[object Object]

[object Object],[object Object],[object Object],+ - I

Types of Magnetic Materials ,[object Object],[object Object],[object Object],Assignment: Research “Types of magnetic materials” Computerized, Short Bond paper. To be submitted next meeting.

Field Symmetry ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

continuation: ,[object Object],[object Object],[object Object],N S

continuation: β β β β A A A β β

Conducting loop in a magnetic field ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Note: Changing magnetic field generates electric field. N S continuation:

Faraday’s Law ,[object Object]

Sample Problem: ,[object Object],[object Object],[object Object]

continuation: ,[object Object],S N β S N β S N β β ind β ind I = 0 I I (A) (B) (C) No motion β increasing in the loop β decreasing in the loop

Problem Solving: ,[object Object],[object Object],[object Object],[object Object]

Inductance ,[object Object],[object Object],[object Object]

Inductor ,[object Object],[object Object],[object Object]

Problem Solving: ,[object Object]

[object Object],[object Object],[object Object],Self-inductance

continuation: ,[object Object],I I CURRENT DECREASING CURRENT INCREASING ε L ε L ε L ε L

continuation: ,[object Object]

continuation: ,[object Object],Inductance L Inductor If the current is increasing then the voltage Opposing that Change is created By the magnetic Field of the coil.

Mutual-Inductance (M) ,[object Object],[object Object]

Alternating Current ,[object Object],[object Object],I t

[object Object],[object Object],[object Object],[object Object],continuation:

continuation: ,[object Object],[object Object],[object Object],Where: W d = Angle of frequency of the emf t = time ε m = amplitude of the emf

Resistive Load ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],R I I ε

Capacitive Load ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],C I I ε

continuation: ,[object Object],[object Object],[object Object]

Inductive Load ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],I I ε L

RLC Series Circuit ,[object Object],ε L R C I I I I

Sample Problem: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Transformer ,[object Object],[object Object],[object Object]

input output Primary winding Secondary winding core Magnetic flux Transformer

Characteristic of an Ideal Transformer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Transformation of voltage and current ,[object Object],[object Object]

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