| Henry Minchin Noad - 1857
...wire ; or the total effect of all the coils is equal to the sum of their effects, if taken singly. **3°. The attractive force of an electro-magnet increases...increase is proportional to the diameters of the iron** cylinders, their lengths being equal. 4f. The purer and softer the iron, and the more homogeneous the... | |
| Henry Minchin Noad - 1867 - 519 pagine
...the wire, or the total effect of all the coils is equal to the sum of their effects if taken singly. **3. The attractive force of an electro-magnet increases...composing it, and this increase is proportional to the** diameter of the iron cylinder, their lengths being equal. ,; The purer anil softer the iron, and the... | |
| Sir William Snow Harris - 1872 - 412 pagine
...the wire, or, the total effect of all the coils is equal to the sum of their effects if taken singly. **3. The attractive force of an electro-magnet increases...composing it, and this increase is proportional to the** diameter of the iron cylinder, their lengths being equal. 4. The purer and softer the iron and the... | |
| Sir William Snow Harris - 1872 - 412 pagine
...the wire, or, the total effect of all the coils is equal to the sum of their effects if taken singly. **3. The attractive force of an electro-magnet increases...composing it, and this increase is proportional to the** diameter of the iron cylinder, their lengths being equal. 4. The purer and softer the iron and the... | |
| |