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NEET2004PhysicsCurrent ElectricityActual

In India electricity is supplied for domestic use at 220 ~V . It is supplied at 110 ~V in USA. If the resistance of a 60 ~W bulb for use in India is R , the resistance of a 60 ~W bulb for use in USA will be:

Options

  1. AR
  2. B2 R
  3. CR 4
  4. DR 2

Correct answer

C. R 4

Step-by-step solution

In India, P₁= (220)^2 R In USA P_V= (110)^2 R₀ As P₁=P_V aligned & (220)^2 R = (110)^2 R_V & R_V= 110 110 220 220 f v= R 4 aligned

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