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- Q) If you wanted to shield your electronics from stray magnetic fields, what would you use for the box around your electronics. Explain why.2. Suppose that a rectangular toroid has 2000 windings, h = 1 cm, an inner radius of R1 = 4 cm, and an outer radius of R2 = 6 cm. What is the current flowing through the toroid when the energy in its magnetic field is 2.0 x 10-6 J?19. A square conducting loop of side a and resistance R passes through a region of space that has uniform magnetic field B into the page, as shown in the figure. Assume that the speed of the loop is constant throughout its motion. What is the magnitude and direction of the current in the loop: as it enters the magnetic field, a) b) while travelling inside the magnetic field, as it leaves the magnetic field. Provide your answer symbolically. a V Ø 8 Ø Top view Uniform magnetic field pointing into the page
- 9. The figure below shows two crossed wires that are carrying currents (1, = 66.0 A and l, = 50.0 A ). What is the magnitude of the total magnetic field at point (P) where a = 16.5 cm and b = 6.80 cm? b9. The figure below shows two crossed wires that are carrying currents (I1 = 77.0 A and I2 = 20.0 A ). What is the magnitude of the total magnetic field at point (P) where a = 15.0 cm and b = 5.60 cm? 0of19 oof19 oof9 0of19 oom P oof19 0of19 oon9 oof19 oof oofot oof19 0of19 o7. A very long thin wire produces a magnetic field of 0.002 x 10-4 T at a distance of 1.0 mm from the wire. What is the magnitude of the current? = 4 x 10-7 T.m/A) (Mo a) 1.0 mA b) 2.0 mA c) 4000 mA d) 3100 mA 8. An ideal solenoid having 200 turns and carrying a current of 2.0 A is 25 cm long. What is the magnitude of the magnetic field at the center of the solenoid? (но = 4 x 10-7 T.m/A)
- 4. Some pacemakers employ magnetic reed switches to enable doctors to change their mode of operation without surgery. A typical reed switch can be switched from one position to another with a magnetic field of 50 10 4 . × . − T What current must a wire carry if it is to produce a 5 0 10 4 . × − T field at a distance of 0.50 m?3. A zero-resistance rod of length 14.4 cm is being pushed along zero-resistance wires in a region where a uniform magnetic field of strength 2.00 T is directed out of the page as shown. If the wires and rod complete a circuit through a 2.90 N resistor then what velocity will the rod maintain if it is subjected to a constant pushing force of 22.0 N? Zero-resistance wires Push