| 26: Using Resistance Values in a Series Circuit to Alter Voltage and to Indicate Temperature | $4.99000 | 
          
                  | 27: Current Flow in a Parallel Circuit | $4.99000 | 
          
                  | 28: Calculating Voltage Drop in a Parallel Circuit | $4.99000 | 
          
                  | 29: Calculating Amps in a Parallel Circuit | $4.99000 | 
          
                  | 30: Total or Effective Resistance in a Parallel Circuit (FREE for Members) | $0.00000 | 
          
                  | 31: Calculating Effective Resistances in a Parallel Circuit | $4.99000 | 
          
                  | 32: Introducing Variable Resistors | $4.99000 | 
          
                  | 33: Variable Resistors: Function and Construction | $4.99000 | 
          
                  | 34: How Variable Resistors Are Used for Modern Throttle Control Systems | $4.99000 | 
          
                  | 35: Introduction to Magnetism | $4.99000 | 
          
                  | 36: Magnetism Terminology | $4.99000 | 
          
                  | 37: Magnetic Fields and Permanent Magnets | $4.99000 | 
          
                  | 38: Attraction of Magnetic Substances | $4.99000 | 
          
                  | 39: Creating Movement with Magnetism | $4.99000 | 
          
                  | 40: Electro-Magnets: Creating Magnetism with Electric Current | $4.99000 | 
          
                  | 41: Electro-Magnets: Poles and Magnetic Fields | $4.99000 | 
          
                  | 42: Creating a Strong Electro-Magnetic Field with Multiple Loops of Wire | $4.99000 | 
          
                  | 43: Swapping the North and South Poles and the Direction of Electro-Magnetic Lines of Force | $4.99000 | 
          
                  | 44: One Electro-Magnet with Four Ways to Change the Position of the North and South Poles | $4.99000 | 
          
                  | 45: Creating Rotational Movement with an Electro-Magnet | $4.99000 | 
          
                  | 46: Electro-Magnet Terminology | $4.99000 | 
          
                  | 47: Creating More Powerful Electro-Magnets and Electric Motors | $4.99000 | 
          
                  | 48: Permanent Magnets vs Electro-Magnets in Electric Motors | $4.99000 | 
          
                  | 49: Using Alternating Current to Reverse the Magnetic Polarity | $4.99000 | 
          
                  | 50: Different Types of Electric Motor for Performing Different Tasks | $4.99000 |