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What is Back EMF in DC Motors? - Another Teaching Moment | DigiKey
In this video, the relationship between current and magnetic flux creating back electromotive force is discussed as well as the left-hand and right-hand rules used for determining magnetic field direction and current flow.
Part List
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
 | 108100005 | GEARMOTOR 60 RPM 6V | 0 - Immediate | $27.83 | View Details | |
 |  | 121388800010A | STANDARD MOTOR 13800 RPM 12V | 0 - Immediate | $477.72 | View Details |
 | 290-006 | GEARMOTOR 639 RPM 12V W/ 1/19 | 0 - Immediate | $61.80 | View Details | |
| 290-008 | GEARMOTOR 125 RPM 6V W/ 1/53 | 0 - Immediate | $61.80 | View Details | |
|  | QBL4208-41-04-006 | STANDARD MOTOR 4000 RPM 24V | 54 - Immediate | $341.04 | View Details |
|  | QBL4208-61-04-013 | STANDARD MOTOR 4000 RPM 24V | 20 - Immediate | $438.74 | View Details |
|  | QBL4208-81-04-019 | STANDARD MOTOR 4000 RPM 24V | 3 - Immediate | $459.73 | View Details |
|  | QBL4208-100-04-025 | STANDARD MOTOR 4000 RPM 24V | 3 - Immediate | $596.66 | View Details |
|  | QBL5704-94-04-032 | STANDARD MOTOR 4000 RPM 36V | 0 - Immediate | $578.76 | View Details |
|  | QBL5704-116-04-042 | STANDARD MOTOR 4000 RPM 36V | 5 - Immediate | $659.20 | View Details |
|  | PD42-1-1670-CANOPEN | SERVOMOTOR 4000 RPM 24V | 0 - Immediate | See Page for Pricing | View Details |
|  | PD42-1-1670-TMCL | SERVOMOTOR 4000 RPM 24V | 0 - Immediate | See Page for Pricing | View Details |
|  | PD42-2-1670-CANOPEN | SERVOMOTOR 4000 RPM 24V | 0 - Immediate | See Page for Pricing | View Details |
|  | PD42-2-1670-TMCL | SERVOMOTOR 4000 RPM 24V | 3 - Immediate | $1,333.22 | View Details |
|  | PD42-3-1670-CANOPEN | SERVOMOTOR 4000 RPM 24V | 2 - Immediate | $1,298.87 | View Details |
|  | PD42-3-1670-TMCL | SERVOMOTOR 4000 RPM 24V | 0 - Immediate | $1,225.01 | View Details |
|  | QBL4208-100-04-025-1K | STANDARD MOTOR 4000 RPM 24V | 16 - Immediate | $899.12 | View Details |
|  | QBL4208-61-04-013-1K | STANDARD MOTOR 4000 RPM 24V | 32 - Immediate | $748.43 | View Details |
 | 1075 | SQUARE FORCE-SENSITIVE RESISTOR | 0 - Immediate | $28.32 | View Details |
