chapter 30 pt 1

30.3

3. | A 10-cm-lnng wire is pulled along a Ushaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0.20 (2. Pulling the wire at a steady speed of 4.0 m/s causes 4.0 W of power to be dissipated in the circuit. a. How big is the pulling force? b. What is the strength of the magnetic field? 5. || FIGURE EX30.5 shows a 10 cm X10 cm square bent at a 90 angle. A uniform 0.050 T magnetic field points downward at a 45 angle. What is the magnetic flux through the loop\"? B 5 cm 10 cm 450 INNING 5 cm FIGURE EX30.515. | The resistance of the loop in FIGURE 330.15 is 0.20 9. Is the magnetic field strength increasing or decreasing? At What rate (T/s)? FIGURE EX30.15 8.0 cm