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The temperature coefficient of resistivity of material is 0.0004/k. When the temperature of the material is increased by 50°C, its resistivity increases by 2 cross times 10 to the power of negative 8 end exponent o h m minus m. The initial resistivity of the material in ohm-m is

  1. 50 cross times 10 to the power of negative 8 end exponent    
  2. 90 cross times 10 to the power of negative 8 end exponent    
  3. 100 cross times 10 to the power of negative 8 end exponent    
  4. 200 cross times 10 to the power of negative 8 end exponent    

The correct answer is: 100 cross times 10 to the power of negative 8 end exponent

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