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NEET2003PhysicsAlternating CurrentActual

Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time combination is connected to a 220 volt a.c. supply line. The power drawn by the combination in each case respectively will be:

Options

  1. A50 watt, 10 watt
  2. B100 watt, 50 watt
  3. C200 watt, 150 watt
  4. D50 watt, 200 watt

Correct answer

D. 50 watt, 200 watt

Step-by-step solution

( aligned & R ₁= V ^2 P ₁ = (220)^2 100 =484 & R ₂= V ^2 P ₂ = (220)^2 100 =484 & I = 220 484 2 = 5 22 & P = I ^2 ( R ₁+ R ₂ )= 25 22 22 (484 2) & =50 ~W aligned ) ( aligned & P= V^2 R₁ + V^2 R₂ & = 2 (220)^2 484 =200 ~W aligned )

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