The wheel with 10 metallic spokes each of 0.5 m long rotated with a speed of 120 rpm in a plane normal to the magnetic field 3.5x10^-5 Wb/m^2. What is the induced e.m.f. between the axel and the rim of the wheel.
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- A current of 22.0 mA is maintained in a single circular loop of 4.00 m circumference. A magnetic field of 0.650 T is directed parallel to the plane of the loop. (a) Calculate the magnetic moment of the loop. mA m² (b) What is the magnitude of the torque exerted by the magnetic field on the loop? mN. mA mass spectrometer is used to examine the isotopes of uranium. Ions in the beam emerge from the velocity selector at a speed of 2.78 x 105 m/s and enter a uniform magnetic field of 0.575 T directed perpendicularly to the velocity of the ions. What is the distance between the impact points formed on the photographic plate by singly charged ions of 235U and 238U? cm Need Help? Read ItFIGURE 4 shows a 0.8 m long metal bar being pulled to the right at a steady speed of 5.8 ms-1 perpendicular to a 667 mT uniform magnetic field. The 5.8 m parallel metal rails are connected to a 6.3 Ω resistor.
- Please helpMag-Lev trains can reach high speeds in part by minimizing the friction associated with moving over the ground. The strong magnetic fields necessary to lift a train are generated by superconducting electromagnetic coils. An engineer believes that each of the solenoids used in the train track needs to generate a field no less than 4.0 Teslas using a current of 6.5*102 A. If the coil can be no longer than 25 cm in length, how many windings would it need?Consider a conductive bar sliding on a pair of parallel conducting rails with a uniform perpendicular magnetic field passing through. Suppose the induced e.m.f. E=1.0V when the bar is sliding with speed of v=1 m/s. What would be the induced e.m.f. if you double the speed?
- what is the answer??! help!3. In Figure 2, a metal wire of mass m = 24.1 mg can slide with negligible friction on two сan horizontal parallel rails separated by distance d = 2.56 cm. The track lies in a vertical uniform magnetic field of magnitude 56.3 mT. At time t = 0, device G is connected to the rails, producing a constant current i = 9.13 mA in the wire and rails (even as the wire moves). At t = 61.1 ms, what are the wire's speed and direction of motion (left or right)? B m Figure 2The magnetic field is pointing out of the board everywhere in space.The metal bar on top of the rails is being moved by an external agentto the right. What is the direction of the induced current on the bar?