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A (100 W, 200 V) bulb is connected to a 160V power supply. The power consumption would be (a) 125 W (b) 100 W (c) 80 W (d) 64 W



A (100 W, 200 V) bulb is connected to a 160V power supply. The power consumption would be


        (a)    125 W


        (b)    100 W


        (c)    80 W


        (d)    64 W


Grade:11

1 Answers

Hrishant Goswami
343 Points
8 years ago

(d)

Power = 100 W, Voltage = 200 V

 

        Resistance of bulb

 

        When bulb is applied across 160 V,

 

        Current in bulb =160/400  A

Power consumption = VI = 64W

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