synchronous motor is supplied by a three$-$phase power source. The motor draws $2000$W under $0\mathrm{.}6$

leading power factor. If the line$-$to$-$line voltage at the motorbusis Vab. $=173$ LOV and the motorinternal

impedance is X a $=1\mathrm{.}50$hm$,$

$$calculate the motor's current $(10$ Points$)$

$$calculate the motor's internal voltage E$,(10$ Points$)$

$$Calculate the field current if the field mutual inductance M$,=30$m $10$ Points$)$ Hint: $0$ g $($Eil $=$

V$2$

$$What change is made to the motor's internal voltage if the field current is doubled? $(5$ points$)$

$$Is the motor over$-$ or underexcited?

$3$m

$1\mathrm{.}2$

a$.$ Compute the mutual inductance per kilometer between the power line and the telephone

Din

for flux linkage of each conductor and set telephone line current to zero.

$$Find the $60$Hz voltage per kilometer induced in the telephone line when the power line carries $150$A$.(10$ Points$)$

$$Compute self inductance per kilometer of the telephone line if the radius of the telephone line conductor is $1$cm$.(10$ Points$)$