8- The synchronous impedance of a single phase alternator, for the same excitation current, is calculated by the formula: Eo a) Zga b) Zg=E0 c) Zg = Eox Isc Isc 17, 1X₂ V LR₂ Number of poles 2p = 4, total number of stator conductors is 330, frequency f= 50 Hz, flux per pole = 20 mWb and Kapp's coefficient K, 2.1. The induced electromotive force per phase is equal to: c) 231 V a) 2310 V b) 1386 V 9- The adjacent figure represents the Behn-Eschenburg diagram of the alternator in case of: b) inductive load a) resistive load c) capacitive load 10- A 3-phase alternator has the following characteristics:

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Q: v. With reference to an 50 Hz3 phase alternator explain how P,Q,V and F are controlled.

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Magnetic Moment

The magnetic moment is defined as the alignment of a magnet and its strength when the magnet is creating a magnetic field. There are number of examples of the magnetic moment, few are a current carrying conductor in the form of coil, elements at microscopic levels like electrons and many more.