Electrical Machines
In synchronous generator, inverted V curve is drawn between

 field current on X-axis and armature current on Y-axis
 field current on Y-axis and armature current on X-axis
 field current on Y-axis and power factor on X-axis
 field current on X-axis and power factor on Y-axis

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Electrical Machines
Which is the arrangement of windings in a core type single phase transformer?

 Lv on one core limb and hv on the other
 Half hv inside and half lv outside on each core limb
 Sandwiched lv and hv discs on each core limb
 Half lv inside and half hv outside on each core limb

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Electrical Machines
A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be

 ½ ( ф - фᵢ ) in all the four quadrants
 ½ ( ф + фᵢ ) in all the four quadrants
 ½ ( ф + фᵢ ) in two adjacent quadrants and ½ ( ф - фᵢ ) in the remaining two quadrants
 ½ ( ф + фᵢ ) in two diametrically opposite quadrants and ½ ( ф - фᵢ ) in the remaining two Quadrants

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