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STD 11 - 10.1. thermonetry,thermal expansion and calorimetry — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 10.1. thermonetry,thermal expansion and calorimetry4 Marks
MCQ
A rod is placed on a smooth horizontal surface. The stress developed when temperature is increased by $40\,^oC$

$[\alpha = 5\, \times\, 10^{-5}\,^oC^{-1},\,\, \gamma = 5\, \times\, 10^{11}\,\, N/m^2]$

  • A
    $10^9\,\,N/m^2$
  • B
    $2\,\,\times\,\,10^9\,\,N/m^2$
  • C
    $10^{11}\,\,N/m^2$
  • ✓
    Zero
✓

Answer

Correct option: D.
Zero
d
No stress will develop as both ends of rod are free and rod is placed on smooth floor

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