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Heat and Thermodynamics question

2016 · Shift 0 · Q58
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  5. /2016 · Shift 0 · Q58

Heat and Thermodynamics question

2016 · Shift 0 · Q58

JEE MainPhysicsHeat and ThermodynamicsMCQ+4 / −1
A pendulum clock loses 12s12s12s a day if the temperature is 40∘C{40^ \circ }C40∘C and gains 4s4s4s a day if the temperature is 20∘C.{20^ \circ }C.20∘C. The temperature at which the clock will show correct time, and the co-efficient of linear expansion (α)\left( \alpha \right)(α) of the metal of the pendulum shaft are respectively :
  1. A
    30∘C;  α=1.85×10−3/∘C{30^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 3}}/{}^ \circ C30∘C;α=1.85×10−3/∘C
  2. B
    55∘C;  α=1.85×10−2/∘C{55^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 2}}/{}^ \circ C55∘C;α=1.85×10−2/∘C
  3. C
    25∘C;  α=1.85×10−5/∘C{25^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 5}}/{}^ \circ C25∘C;α=1.85×10−5/∘C
  4. D
    60∘C;  α=1.85×10−4/∘C{60^ \circ }C;\,\,\alpha = 1.85 \times {10^{ - 4}}/{}^ \circ C60∘C;α=1.85×10−4/∘C
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