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QJEEM19Phb03d: JEE Main 2019 Physics - Class 12 JEEM19Phb03d Solution: Two equal resistances when connected in series to a battery,…

Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be :

Multiple Choice Options

  • A 240 W
  • B 60 W
  • C 30 W
  • D 120 W

Step-by-Step Verified Solution

In series condition, equivalent resistance is 2R

thus power consumed is 60W = ε22R

In parallel condition, equivalent resistance is R/2 thus new power is

P' = ε2(R/2)

or   P' = 4P = 240W

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