002 (part 1 of 2) 10.0 points A circular coil of wire 6.44 cm in diameter has a resistance of 3.93 2. It is located in a magnetic field of 0.327 T directed at right angles to the plane of the coil. The coil is removed from the field in 0.238 s. What is the induced emf in the coil? As- sume the magnetic flux is reduced linearly. Answer in units of V. 003 (part 2 of 2) 10.0 points How much electric energy is lost in the process? Answer in units of J. 004 (part 1 of 3) 10.0 points An electron under the influence of some cen- tral force moves at speed v in a counter- clockwise circular orbit of radius R. A uni- form magnetic field B perpendicular to the plane of the orbit is turned on (see figure). B increasing radius R 2 electron circular path of electron Suppose that the magnitude of the field changes at a given rate B dt What is the magnitude of the electric field induced at the radius of the electron orbit? 2. E=R dB 1. ER dt dB dt dB dt B dt dB 3. E=R 4. E=R 5. E=R dt RdB 2 dt RdB 6. E= 7. E= 2 dt 8. E=R2 he en- dB dt 005 (part 2 of 3) 10.0 points What is the direction of the electric field in- duced at the radius of the electron orbit (as viewed from above)? 1. parallel to B 2. radial outward 3. clockwise 4. radial inward 5. anti-parallel to B 6. counter-clockwise 006 (part 3 of 3) 10.0 points The tangential force on the electron due to the induced electric field increases the electron's zer- ini- speed. dv the Find the magnitude of dt qe R dB 1. 2me dt dB R N 2qe Rme dt dB dt Rme 9 R2 dB dt dt ctron 5. 9. R dB m dv qe R dB 6. 67 = dt 2me dt dv dB 7. 4qe Rme dt dt dv Je qe R dB 8. dt 4m, dt dv Je R dB 9. dt 4 me dt 018 10.0 points In a model generator, a 250-turn rectangular coil 0.072 m by 0.26 m rotates with an angular frequency of 13.0 rad/s in a uniform magnetic field of 0.56 T. What is the maximum emf induced in the coil? Answer in units of V.