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1. A generator with 12 conductors armature coil is rotating in a magnetic field with a magnetic flux density of 0.9 T. Calculate the average voltage induced in the coil if the effective area of the coil is 0.0069 m2 and moves across the pole in 0.0019 second. 2. In a DC generator, the field winding is wound 430 turns with a resistance of 72 ohms. If the magnetic flux linking the coil is 0.0082 Wb with a source voltage of 220 V, then the self-inductance of the coil is 3. Calculate the voltage across a coil if a magnet that generates 20000 maxwells of flux is inserted through a 1500 turns of coil and withdrawn within 0.072 seconds. 4. Determine the inductance of a coil if it induces 196 V and the current changes to 0.0069 A in just 0.0072 sec.