Question

4. Problem A long wire is bent to form a rectangular section and is placed in a region with a uniform magnetic id, as shown in Fig ure 27.4. The magnetic field is directed downward and has a magnitude of 2.5T. The wire carries a 25- A current. Find the net torque on the wire about the z-axis. 025m 5. Problem Figure 29.2 shows a stationary current loop next to a long, straight wire carrying a current direction of the induced current in the loop when the current in the long wire is increasing 6. Problem A series LRC circuit is made from a 100-Ω resistor, an 11-mH inductor, and a 0.2 ljuF capacitor. The elements are connected to an alternating-voltage source with a maximum voltage of 50 V operating at a frequency of 5000 Hz. Find the maximum current and the phase difference between the current and voltage 7. Problenm Why does a perfect reflector exert twice the radiation pressure on a surface compared with a total absorber?

problem #4 #7

Answer 1

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