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

This preview shows pages 1–4. Sign up to view the full content.

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: A. 2 . 5Wb B. 4 . 3Wb C. 5 Wb D. 5 . 8Wb E. 10 Wb ans: B 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: A. 2 . 0Wb B. 3 . C. 5 . 2Wb D. 6 . E. 12 Wb ans: C 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: A. 2 . B. 4 . C. 5 Wb D. 5 . E. 10 Wb ans: E 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

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
6. 1 weber is the same as: A. 1 V · s B. 1 T · s C. 1 T / m D. 1 V / s E. 1 T / m 2 ans: A 7. The units of motional emf are: A. volt/second B. volt · meter/second C. volt/tesla D. tesla/second E. tesla · meter 2 /second ans: E 8. Faraday’s law states that an induced emf is proportional to: A. the rate of change of the magnetic f eld B. the rate of change of the electric f eld C. the rate of change of the magnetic F ux D. the rate of change of the electric F ux E. zero ans: C 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: A. energy must be dissipated as heat B. an electric f eld must exist at the boundary C. a current must F ow around the boundary D. an emf must exist around the boundary E. a magnetic f eld must exist at the boundary ans: D 432 Chapter 30: INDUCTION AND INDUCTANCE
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: A. counterclockwise B. clockwise C. zero D. up the left edge and from right to left along the top edge E. through the middle of the page ans: B 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: A. increasing in magnitude B. decreasing in magnitude C. in the same direction as the applied f eld D. directed opposite to the applied f eld E. perpendicular to the applied f eld ans: D 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

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

### Page1 / 24

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

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online