QUESTION $5$: AC MACHINES

$5\mathrm{.}1$ A three$-$phase, six$-$pole induction motor rotates at $\backslash (400\backslash$mathrm$\{$r$\}/\backslash$mathrm$\{$min$\}\backslash )$ while being supplied from a $\backslash (410\backslash$mathrm$\{$~V$\},50\backslash$mathrm$\{$~Hz$\}\backslash )$ source.

Calculate:

$5\mathrm{.}1\mathrm{.}1$ The percentage slip at which the rotor of the induction motor is operating.

$5\mathrm{.}1\mathrm{.}2$ The per$-$unit slip at which the rotor is operating.

$5\mathrm{.}2$ Briefly explain how to reverse the direction of rotation of the following motors:

$5\mathrm{.}2\mathrm{.}1$ Three$-$phase induction motor Chansing one Swappiof

$5\mathrm{.}2\mathrm{.}2$ Single$-$phase induction motor

$5\mathrm{.}2\mathrm{.}3$ Universal motor

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$(3\backslash$times $2)$

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