100mm Spark Induction Coil with Adjustable Vibrator Science at Home_Elementary Science this polished hardwood funnel stand

this polished hardwood funnel stand holds two 1

spanning cell voltages up through high-tension supply outputs

Double-concave glass lens at 3-inch diameter and 200mm diverging focal length

supplying the next step up from the 1-ohm value for low-resistance investigations of current-versus-voltage behavior

Demonstrates Hooke's Law

100mm Spark Induction Coil with Adjustable Vibrator Science at Home_Elementary Science this polished hardwood funnel standLarger spark 100mm induction coil from a 6 12V DC input with adjustable vibrator and base mounted suppression capacitors, supplied with two 5 inch insulated handle pointer electrodes.