Testing for conductivity using a battery connected by a lead to a small light bulb,a lead leading from the battery to a knife and a lead from the bulb to the knife | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Dorling Kindersley / UIG |
Taille de l’image : | 6537 px × 2674 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |