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Manipal MET2019PhysicsCurrent Electricity

The temperature coefficient of resistance of a wire is 0.00125^ C ⁻¹ . At 300 K , its resistance is 1 . At what temperature the resistance of the wire will be 2 ?

Options

  1. A800 K
  2. B1100 K
  3. C600 K
  4. DNone of the above

Correct answer

B. 1100 K

Step-by-step solution

aligned R_t= & R₀(1+ T) 2 & =1(1+0.00125 T) T & = 1 0.00125 ( neglecting - ve sign) T & =800+300=1100 ~K aligned

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