Electrical Machines
If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated)

 remain the same as the original
 changes to 0.5 times the original value
 changes to 1.5 times the original value
 changes to three times the original value

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

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

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