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# ch30 - Chapter 30 INDUCTION AND INDUCTANCE 1 The normal to...

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Chapter 30: INDUCTION AND INDUCTANCE 1. The normal to a certain 1-m 2 area makes an angle of 60 with a uniform magnetic f eld. The magnetic F ux through this area is the same as the F ux through a second area that is perpendicular to the f eld if the second area is: A. 0 . 866 m 2 B. 1 . 15 m 2 C. 0 . 5m 2 D. 2 m 2 E. 1 m 2 ans: C 2. Suppose this page is perpendicular to a uniform magnetic f eld and the magnetic F ux through it is 5 Wb. If the page is turned by 30 around an edge the F ux through it will be: 3. A 2-T uniform magnetic f eld makes an angle of 30 with the z axis. The magnetic F ux through a 3-m 2 portion of the xy plane is: 4. A uniform magnetic f eld makes an angle of 30 with the z axis. If the magnetic F ux through a 1-m 2 portion of the xy plane is 5 Wb then the magnetic F ux through a 2-m 2 portion of the same plane is: 5. 1 weber is the same as: A. 1 V / s B. 1 T / s C. 1 T / m D. 1 T · m 2 E. 1 T / m 2 ans: D Chapter 30: INDUCTION AND INDUCTANCE 431

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6. 1 weber is the same as: 7. The units of motional emf are: 8. Faraday’s law states that an induced emf is proportional to: 9. The emf that appears in Faraday’s law is: A. around a conducting circuit B. around the boundary of the surface used to compute the magnetic F ux C. throughout the surface used to compute the magnetic F ux D. perpendicular to the surface used to compute the magnetic F ux E. none of the above ans: B 10. If the magnetic F ux through a certain region is changing with time:
11. A square loop of wire lies in the plane of the page. A decreasing magnetic f eld is directed into the page. The induced current in the loop is: 12. As an externally generated magnetic f eld through a certain conducting loop increases in mag- nitude, the f eld produced at points inside the loop by the current induced in the loop must be: 13. At any instant of time the total magnetic F ux through a stationary conducting loop is less in magnitude than the F ux associated with an externally applied f eld. This might occur because: A. the applied f

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ch30 - Chapter 30 INDUCTION AND INDUCTANCE 1 The normal to...

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