Questions
When a rod is heated from 25°C to 75°C, it expands by 1 mm. When a rod of same material but with 4 times the length is heated from 25°C to 50°C. The increase in length is
a
1mm
b
1.5mm
c
1.6mm
d
2 mm
detailed solution
Correct option is D
As α1=α2 ⇒e1l1Δt1=e2I2Δt2Talk to our academic expert!
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A rotating solid metal sphere is heated by . If then percentage change in its moment of inertia is
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