(3) The diameter of the conductor: the smaller the cross-sectional area of the conductor, the higher the resistance. (4) Temperature: normally an increase of temperature of the conductor causes an increase in the resistance. (5) Physical condition of the conductor: if the conductor is damaged by nicks, cuts, or corrosion, the resistance will increase because the conductor’s diameter is decreased by these. (ON SLIDE #30) (6) Resistance (load) is required to change electrical energy to light, heat, or movement. There is resistance in any working device of a circuit, such as a lamp, motor, relay, or other load component. (ON #31) (7) There may be unwanted resistance in a circuit. This could be in the form of a corroded connection or a broken conductor. In these instances, the resistance may cause the load component to operate at a reduced efficiency or to not operate at all. (8) It does not matter if the resistance is from the load component or from unwanted resistance. There are certain principles that dictate its impact in the circuit: (a) Voltage always drops as current flows through the resistance. (b) An increase in resistance causes a decrease in current. (c) All resistance changes the electrical energy into another form of energy to some extent. (ON #32)
(3) The diameter of the conductor: the smaller the cross-sectional area of the conductor, the higher the resistance. (4) Temperature: normally an increase of temperature of the conductor causes an increase in the resistance. (5) Physical condition of the conductor: if the conductor is damaged by nicks, cuts, or corrosion, the resistance will increase because the conductor’s diameter is decreased by these. (ON SLIDE #30) (6) Resistance (load) is required to change electrical energy to light, heat, or movement. There is resistance in any working device of a circuit, such as a lamp, motor, relay, or other load component. (ON #31) (7) There may be unwanted resistance in a circuit. This could be in the form of a corroded connection or a broken conductor. In these instances, the resistance may cause the load component to operate at a reduced efficiency or to not operate at all. (8) It does not matter if the resistance is from the load component or from unwanted resistance. There are certain principles that dictate its impact in the circuit: (a) Voltage always drops as current flows through the resistance. (b) An increase in resistance causes a decrease in current. (c) All resistance changes the electrical energy into another form of energy to some extent. (ON #32)
Complete%20DO%20ELECTRICAL.docx