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AP EAMCET201825 Apr 2018Morning ShiftPhysicsCurrent ElectricityActual

A dc source with internal resistance R 0 is connected to three identical resistors each of resistance R as shown in the figure. If the thermal power generated in the circuit is highest, then

Options

  1. AR = 2 R 0
  2. BR = 3 R 0
  3. CR = R 0 3
  4. DR = R 0

Correct answer

B. R = 3 R 0

Step-by-step solution

In case of the highest power generated the value of internal resistance should be equal to a total external resistance, here all three external resistance are connected in parallel, ⇒ R 0 = R 3 ⇒ R = 3 R 0

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