Theory Section 2: Magnetism and E.m.f.
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theoretical Elements of Electrical Engineering |
| Year | 1915 |
| Section ID | theoretical-elements-electrical-engineering-section-02 |
| Location | lines 910-1032 |
| Status | candidate |
| Word Count | 623 |
| Equation Candidates In Section | 17 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”2. MAGNETISM AND E.M.F. 11. In an electric conductor moving relatively to a magnetic field, an e.m.f. is generated proportional to the rate of cutting of the lines of magnetic force by the conductor. Unit e.m.f. is the e.m.f. generated in a conductor cutting one line of magnetic force per second. 108 times unit e.m.f. is the practical unit, called the volt. Coiling the conductor n fold increases the e.m.f. n fold, by cutting each line of magnetic force n times. In a closed electric circuit the e.m.f. produces an electric current. The ratio of e.m.f. to electric current produced thereby is called the resistance of the electric circuit. Unit resistance is the resistance of a circuit in which unit e.m.f. produces unit current. 109 times unit resistance is the practical unit, called the ohm.Source-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Magnetism
Section titled “Magnetism”2. MAGNETISM AND E.M.F. 11. In an electric conductor moving relatively to a magnetic field, an e.m.f. is generated proportional to the rate of cutting of the lines of magnetic force by the conductor. Unit e.m.f. is the e.m.f. generated in a conducto ...Field language
Section titled “Field language”2. MAGNETISM AND E.M.F. 11. In an electric conductor moving relatively to a magnetic field, an e.m.f. is generated proportional to the rate of cutting of the lines of magnetic force by the conductor. Unit e.m.f. is the e.m.f. generated in a conductor cutting one line of magnetic force per second. 108 times unit e.m.f. is the ...Chapter-Local Concept Hits
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Chapter-Local Glossary Hits
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Equation Candidates
Section titled “Equation Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
theoretical-elements-electrical-engineering-eq-candidate-0077 | 109 times unit resistance is the practical unit, called the | line 933 |
theoretical-elements-electrical-engineering-eq-candidate-0078 | The ohm is the resistance of a circuit, in which 1 volt | line 939 |
theoretical-elements-electrical-engineering-eq-candidate-0079 | and resistivity p is r = -7” | line 952 |
theoretical-elements-electrical-engineering-eq-candidate-0080 | cylinder, if the magnetic flux of the electromagnet is <£ = 25 | line 985 |
theoretical-elements-electrical-engineering-eq-candidate-0081 | lines. It makes 50 rev. per sec. Thus it cuts 50 X 25 X 106 = | line 989 |
theoretical-elements-electrical-engineering-eq-candidate-0082 | 12.5 X 108 lines of magnetic flux per second. Hence the gener- | line 990 |
theoretical-elements-electrical-engineering-eq-candidate-0083 | ated e.m.f. is E = 12.5 volts. | line 991 |
theoretical-elements-electrical-engineering-eq-candidate-0084 | (B. & S.), 0.106 sq. cm. in cross section and 160 cm. mean length | line 1005 |
Figure Candidates
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Hidden-Gem Quote Candidates
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
- Field language: Read for whether field language is mechanical, geometrical, causal, descriptive, or simply a convenient engineering model.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
- Field language: Field-pressure or field-gradient interpretations can be explored here only after the explicit source passage and modern engineering translation are kept distinct.
Promotion Checklist
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- Move mathematical candidates into canonical equation pages only after formula typography is corrected.
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