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I am about to write example, I there for looking for N5 Electrotechinc past exam papers

Why are the field coil winding of a shunt machine wound with relatively thin wire

The armature resistance of a six pole, 500v wave connected series motor is 0,5ohm which takes61 amperes from the suppliy.the motor has 72 slots with 10 in each slot.the total fluxper pole is 50mwb. calculate the speed of the motor

The number of series turns per pole require on a 355 kw long shunt compound generator must ve determined to enable it to maintain a constant voltage of 580V, between no-load and full-load. Without any series winding, it is found that the shunt current has to be 6A on no-load and 7,5A on full- load to maintain the voltage constant at 580V. Number of turns per pole on the shunt winding is 2100.
Calculate the damagnetising and criss- magnetising ampere turns per pole

A three-phase delta-connected load, of which phase has an inductive reactance of 40 ohms and a resistance of 25 ohms,is fed from the secondary of a three-phase star-connected transformer, which has a phase voltage of 240v.1 calculate the potential difference across each phase of the load.2 the phase current in each phase of the load.3the current in the transformer's secondary windings.4 total power taken from the supply and its power factor

An eight pole DC motor has a lap wound armature with 820 conductors. The armuture current is 648 A. Assuming that the ratio of the armature per turns per pole to the interpole ampere turns per pole is 0,88


Determine the number of turns per pole that is required for the interpole