A clock pendulum made of invar has a period of 0.5 { s}, at 20^{\circ} {\C}. If the clock is used in a climate where the temperature averages to 30^{\circ} {\C}, how much time does the clock lose in each oscillation? (For invar, \alpha=9 \times 10^{-7} \/{ }^{\circ} {\C}, g= constant)

Correct Answer is : 2.25×10−6 s

EAMCET Engineering 2009 Solved Paper

Section: Physics

Question : 12 of 160

Marks: +1, -0

A clock pendulum made of invar has a period of 0.5 s, at 20∘C. If the clock is used in a climate where the temperature averages to 30∘C, how much time does the clock lose in each oscillation? (For invar, α=9×10−7∕‌∘C, g= constant)

2.25×10−6 s
2.5×10−7 s
5×10−7 s
1.125×10−6 s

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