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AP EAMCET202018 Sep 2020Evening ShiftPhysicsCurrent ElectricityActual

The (V-I ) graph for a conductor at temperature (T₁ ) and (T₂ ) are as shown in the figure. (T₂-T₁ ) is proportional to

Options

  1. A( 2 )
  2. B( 2 )
  3. C( 2 )
  4. D( 2 )

Correct answer

C. ( 2 )

Step-by-step solution

(V-I ) graph for conductor at temperature (T₁ ) and (T₂ ) is shown in the figure. We know that resistance of a conductor is directly proportional to its temperature. ( array ll Hence, & R₁ T₁ T₁ & =K T₁ (i) and & R₂ T₂ & (90^ - ) T₂ & T₂ & =K T₂ (ii) array ) ( ) From Eqs. (i) and (ii), we get ( aligned & K T₂-K T₁= - & K (T₂-T₁ )= - & T₂-T₁= ^2 - ^2 K & T₂-T₁= 2 1 2 2 T₂-T₁= 2 2 K & T₂-T₁ 2 aligned )

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