Paper, 'Note on induction coils or "transformers"' by John Hopkinson

Description

Hopkinson writes: 'The transformers considered are those having a continuous iron magnetic circuit of uniform section. Let A be area of section of the core, m and n the number of convolutions of the primary and secondary coils respectively, R, r, and ρ their resistances, ρ being the resistance of the secondary external to the transformer, x and y currents in the two coils, a induction per square centimetre, α the magnetic force, l the length of the magnetic circuit, E = B sin 2π (t/T), the difference of potentials between the extremities of the primary, T being the periodic time.'

Annotations in pencil and ink throughout. Includes three geometrical diagrams.

Subject: Physics

Received 17 February 1887. Read 10 March 1887.

A version of this paper was published in volume 42 of the Proceedings of the Royal Society as 'Note on induction coils or "transformers"'.

Reference number

PP/10/19

Earliest possible date

1887

Physical description

Ink and graphite pencil on paper

Page extent

10 pages

Format

Manuscript
Diagram