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4. Induced EMF and Magnetic Flux Induction, AC Circuits, and Electrical Technolo... > Induced EMF and Magnetic Flux Free to share, print, make copies and changes. Get yours at www.boundless.com www.boundless.com/physics?campaign_content=book_5818_section_183&campaign_term=Physics&utm_campaign=powerpoint&utm_medium= direct&utm_source=boundless

5. It is a change in the magnetic field flux that results in an electromotive force (or voltage). The magnetic flux (often denoted Φ or ΦB) through a surface is the component of the magnetic field passing through that surface. Induced EMF and Magnetic Flux Free to share, print, make copies and changes. Get yours at www.boundless.com www.boundless.com/physics/textbooks/alternative-to-physics-9th-john-d-cutnell-kenneth-w-johnson-1118129172-9781118129173/induction-ac- circuits-and-electrical-technologies-induction-22/induced-emf-and-magnetic-flux-183/induced-emf-and-magnetic-flux-650- 6335?campaign_content=book_5818_section_183&campaign_term=Physics&utm_campaign=powerpoint&utm_medium=direct&utm_source=bou ndless Faraday's Apparatus View on Boundless.com Induction, AC Circuits, and Electrical Technolo... > Induced EMF and Magnetic Flux

6. In the most general form, magnetic flux is defined as [Equation 1]. It is the integral (sum) of all of the magnetic field passing through infinitesimal area elements dA. Induction, AC Circuits, and Electrical Technolo... > Induced EMF and Magnetic Flux Free to share, print, make copies and changes. Get yours at www.boundless.com www.boundless.com/physics/textbooks/alternative-to-physics-9th-john-d-cutnell-kenneth-w-johnson-1118129172-9781118129173/induction-ac- circuits-and-electrical-technologies-induction-22/induced-emf-and-magnetic-flux-183/induced-emf-and-magnetic-flux-650- 6335?campaign_content=book_5818_section_183&campaign_term=Physics&utm_campaign=powerpoint&utm_medium=direct&utm_source=bou ndless Equation 1 View on Boundless.com

7. Free to share, print, make copies and changes. Get yours at www.boundless.com Appendix

8. Key terms galvanometer An analog measuring device, denoted by G, that measures current flow using a needle deflection caused by a magnetic field force acting upon a current-carrying wire. vector area A vector whose magnitude is the area under consideration, and whose direction is perpendicular to the surface area. Free to share, print, make copies and changes. Get yours at www.boundless.com Induction, AC Circuits, and Electrical Technolo...

9. Varying Magnetic Field Each point on a surface is associated with a direction, called the surface normal; the magnetic flux through a point is then the component of the magnetic field along this normal direction. Free to share, print, make copies and changes. Get yours at www.boundless.com Wikipedia. "Magnetic flux." CC BY http://en.wikipedia.org/wiki/Magnetic_flux View on Boundless.comCC BYhttp://en.wikipedia.org/wiki/Magnetic_fluxView on Boundless.com Induction, AC Circuits, and Electrical Technolo...

10. Faraday's Apparatus This is Faraday's apparatus for demonstrating that a magnetic field can produce a current. A change in the field produced by the top coil induces an EMF and, hence, a current in the bottom coil. When the switch is opened and closed, the galvanometer registers currents in opposite directions. No current flows through the galvanometer when the switch remains closed or open. Free to share, print, make copies and changes. Get yours at www.boundless.com Connexions. "Induced Emf and Magnetic Flux." CC BY 3.0 http://cnx.org/content/m42390/latest/ View on Boundless.comCC BY 3.0http://cnx.org/content/m42390/latest/View on Boundless.com Induction, AC Circuits, and Electrical Technolo...

11. Free to share, print, make copies and changes. Get yours at www.boundless.com Induction, AC Circuits, and Electrical Technolo... The electromotive force is created by the change in A) magnetic field B) electric field C) gravitational field D) universal force field

12. Free to share, print, make copies and changes. Get yours at www.boundless.comwww.boundless.com Boundless - LO. "Boundless." CC BY-SA 3.0 http://www.boundless.com/CC BY-SA 3.0http://www.boundless.com/ Induction, AC Circuits, and Electrical Technolo... The electromotive force is created by the change in A) magnetic field B) electric field C) gravitational field D) universal force field

13. Free to share, print, make copies and changes. Get yours at www.boundless.com Induction, AC Circuits, and Electrical Technolo... The apparatus used by Faraday included A) an electric generator to convert mechanical energy to electrical energy B) a Van de Graaff generator to accumulate very high amounts of electrical charge C) a galvanometer to detect any current induced in a separate coil on the bottom D) a voltmeter to measure electrical potential difference between two points in an electric circuit

14. Free to share, print, make copies and changes. Get yours at www.boundless.comwww.boundless.com Boundless - LO. "Boundless." CC BY-SA 3.0 http://www.boundless.com/CC BY-SA 3.0http://www.boundless.com/ Induction, AC Circuits, and Electrical Technolo... The apparatus used by Faraday included A) an electric generator to convert mechanical energy to electrical energy B) a Van de Graaff generator to accumulate very high amounts of electrical charge C) a galvanometer to detect any current induced in a separate coil on the bottom D) a voltmeter to measure electrical potential difference between two points in an electric circuit

15. Attribution Connexions. "Induced Emf and Magnetic Flux." CC BY 3.0 http://cnx.org/content/m42390/latest/CC BY 3.0http://cnx.org/content/m42390/latest/ Boundless Learning. "Boundless." CC BY-SA 3.0 http://www.boundless.com//physics/definition/galvanometerCC BY-SA 3.0http://www.boundless.com//physics/definition/galvanometer Wikipedia. "vector area." CC BY-SA 3.0 http://en.wikipedia.org/wiki/vector%2520areaCC BY-SA 3.0http://en.wikipedia.org/wiki/vector%2520area Wikipedia. "Magnetic flux." CC BY-SA 3.0 http://en.wikipedia.org/wiki/Magnetic_fluxCC BY-SA 3.0http://en.wikipedia.org/wiki/Magnetic_flux Free to share, print, make copies and changes. Get yours at www.boundless.com Induction, AC Circuits, and Electrical Technolo...