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Pasco • EM-6709 Primary/ Secondary Coils
The EM-6709 Primary/Secondary Coils provide a clear, hands-on way to explore electromagnetic induction and transformer principles. Designed for durability and classroom use, they allow students to easily observe voltage and current relationships between primary and secondary coils in real time.

Pasco • EM-6709 Primary/ Secondary Coils
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- Description
- Product Specifications
Description
These nested primary and secondary coils have a removable soft iron core. Each coil has safety banana jacks. The inner coil has 302 turns of wire and the outer coil has 3077 turns of wire, making the ratio of turns approximately 10:1.
The direction of the winds is marked with an arrow.
Applications
- Step-up and step-down transformers
- Magnetic field inside a solenoid (using the outer coil)
| Inner Coil Windings | 302 turns |
| Outer Coil Windings | 3077 turns |
| Inner Coil | Inside diameter 10.4 mm, Length 12.3 cm |
| Outer Coil | Inside diameter 18.1 mm, Length 11 cm |
| Inner Coil Maximum Current | 1 A |
| Outer Coil Maximum Current | 0.3 A |
| Inner Coil Resistance | 0.8 Ω |
| Outer Coil Resistance | 41 Ω |
| Soft Iron Core | 9.5 mm diameter, 16.5 cm long |



