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AP EAMCET202018 Sep 2020Morning ShiftPhysicsCurrent ElectricityActual

In a balanced meter bridge, the segment of wire opposite to a known resistance of (70 ) is (70 ~cm ). The unknown resistance is

Options

  1. A(30 )
  2. B(60 )
  3. C(90 )
  4. D(15 )

Correct answer

A. (30 )

Step-by-step solution

In balanced meter bridge known resistance, (S=70 , l=70 ~cm ) ( ) Unknown resistance, (R=S ( 100-l l )= 70(100-70) 70 =30 )

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