QUESTION $27$

Voltage $($E$)$ current $($I$)$ by $q,$ in a purely inductive circuit.

leads, $90$ degrees

leads, $120$ degrees

lags, $90$ degrees

lags, $120$ degrees

QUESTION $28$

Determine the efficiency of an AC generator that has an output of $500$ kW and a $1250$ hp diesel engine as its prime mover.

$29\mathrm{.}8\%$

$40\mathrm{.}0\%$

$48\mathrm{.}6\%$

$53\mathrm{.}6\%$