Excerpt from Practical Radiography: A Hand-Book of the Applications of the X-Rays
As is well known, any ordinary source of electricity, whether a battery, dynamo, friction machine, or what not, has two poles or terminals, relatively described as positive and negative. If these are connected by means of a wire we form what is known as a circuit; and when the battery (etc.) is in action a current of electricity passes along the wire.
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HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000. Codice articolo LX-9780364229460
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Da: PBShop.store UK, Fairford, GLOS, Regno Unito
HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000. Codice articolo LX-9780364229460
Quantità: 15 disponibili