Question

Calculate the total power of the circuit of two
lamps rated as 200W/240V are connected in series
across 240V supply? | 200W/240V 9240V
आपूर्ति से श्रेणी में जुड़े हुए हैं; कुल शक्ति ज्ञात कीजिये।
A 50 W 50 W
P=vx I
B 100 W 100 W
C 200 W 200 W
D 400 W 400 W​

Answer 1

$\:\:\:\: \huge {\underline{\underline{\sf{Solution\::}}}}$

• Here two lamps are connected in series therefore power consumed by the lamps will become parallel combination of two given powers :

Now , P1 = 200 W and P2 = 200 W

$\sf Power\: =\: \dfrac{(P1×P2)}{(P1+P2)}$

$\sf Power\: =\: \dfrac{(200×200)}{(200+200)}$

$\sf Power\: =\: \dfrac{(40000)}{(400)}$

$\:\:\:\: \large\underline{\boxed{\sf{Power\:=\:100\:W}}}$

• Option B is correct

i.e. 100 W and 100 W

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