Electrical Machines
Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is

 1, 4, 6
 1, 3, 5
 1, 2, 6
 1, 2, 5

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

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

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