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AP EAMCET201823 Apr 2018Morning ShiftPhysicsCurrent ElectricityActual

A DC source with internal resistance R₀ 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 R₀
  2. BR=3 R₀
  3. CR= R₀ 3
  4. DR=R₀

Correct answer

B. R=3 R₀

Step-by-step solution

For maximum power, R₀=R_ eq of circuit. Given, resistances are in parallel combination, the equivalent value is aligned & 1 R_ eq = 1 R₀ = 1 R + 1 R + 1 R = 3 R R₀ & = R 3 or R=3 R₀ . aligned

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