13. An electromagnet in a generator has the ability to generate a variety of magnetic fields. O True False
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- The field coils of a D.C. generator have 600 turns. On the excitation of the field, there is a magnetic flux of 0.024 Wb. If the field circuit is opened in 0.24 second and residual magnetism is 0.0024 Wb, calculate the average voltage which is induced across field terminals.A coil of inductance 8mH, produces 80µWb of magnetic flux. Of this total flux, 60µWb are linked to a second coil of inductance 2mH, how much is the mutual inductance between coils?A ring rotates around the y-axis in a magnetic field B=B0sinwt ax Wb/m2. The voltage induced in the ring is related to which of the following? Please choose one: a.None b.A combination of motion and transformer emf C.Motion emf D.Transformer emf
- A length of stiff copper wire is made into a rectangle measuring 24 cm by 10 cm. It is rotated at a uniform speed of 600 rpm about one of its longer sides as axis, this side lying on and at right angle to a uniform magnetic field of 0.5T calculate the induced voltage in the coil. * Draw the diagramInduced voltage acts like a resistance to hinder the flow of current through an inductor. True or False It is often more desieable to the conductor instead of the magnetic field. True or FalseDetermine the emf inducted in a coil that rotates its 1250 r/min. The coil has 60 windings and a length and width of 0.7 and 0.6 respectively. The pole shoe has an area and area of 0.4 meters squared and it moves through a magnetic flux of 36 mWb