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One 200 V, 100 W bulb is connected in series with primary of
a 200 V, 10 kVA transformer. If its secondary is
kept open circuited, then the bulb would have
(1) Full brightness (2) Poor brightness
(3) A little less than full brightness (4) More than full
brightness...explain
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Answer Posted / ajay
Wen X'mer is open cktd. Secondary current became zero. Very small current drawn by primary which supplies copper loss as well as iron loss. So brightness i.e. Power P#vicos@ will becm low. & poor brightness of the bulb seen
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