This document discusses the effects of current flow in single path DC circuits. It describes three main effects: heating, magnetic effects, and sometimes chemical or physiological effects. Heating causes temperature rise and is why components need cooling. Magnetic fields are produced by current flow and allow control of electromagnets. Current passing through the body can cause asphyxiation, ventricular fibrillation, or stop the brain from controlling the heart.

1. UEENEEE003BSolve Problems in Single Path DC CircuitsEffects of Current Flow

2. When current flowsThese two effects are always present:heatingmagneticThese effects may be present:chemicalphysiological8/9/2011Revision022

3. Lets talk about:cable size / insulationthe cooling vanes on electric motorsthe fan on electric motorstransformer coolingpower station coolingelectric soldering ironstoves8/9/2011Revision023HEATING

4. MagneticA magnetic field is produced in a straight conductor, when current flows.If the conductor is made into a coil an electromagnetic is formed.By controlling the current we can control the direction and strength of the magnetic field.Lets talk about:scrap metal handlingsolenoidsmotorspower station, alternator field winding8/9/2011Revision024

5. Limitedbatteriesrefining metals8/9/2011Revision025Chemical

6. 3 DIFFERENT EFFECTSRespiratoryAsphyxia (can’t breathe)Ventricular Fibrillation (Heart stops pumping blood)8/9/2011Revision026Physiological

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10. Respiratory

11. current through the brain, It stops controlling the heart. (not common)Asphyxia0 to 10mA Pain10 to 25mA Arm muscles contract30mA plus The chest muscles contract8/9/2011Revision0210Different effects