QUESTION FIVE

$($a$)$ Distinguish between a motor and a generator

$[4$ marks$]$

$($b$)$ Explain two

$(2)$ methods of generator field excitation.

$[4$ marks$]$

$($c$)$ The shaft torque of a diesel motor driving a $100$ V D$.$C$.$ shunt wound generator is $25$ Nm $.$ The armature current of the generator is $16$ A at this value of torque. If the shunt field regulator is adjusted so that the flux is reduced by $15$ percent, the torque increases to $35$ Nm $.$

Determine the armature current at this new value of torque.

$[12$ marks$]$

TOTAL: $20$ MARKS