A circular metallic disc of radius $R$ has a small circular cavity of radius $r$ as shown in figure. On heating the system
A circular metallic disc of radius $R$ has a small circular cavity of radius $r$ as shown in figure. On heating the system
- A
$R$ increases and $r$ decreases
- B
$R$ decreases and $r$ increases
- C
Both $R$ and $r$ increases
- D
Both $R$ and $r$ decreases
Similar Questions
If a cylinder of diameter $1.0\, cm$ at $30°C$ is to be solid into a hole of diameter $0.9997\, cm$ in a steel plate at the same temperature, then minimum required rise in the temperature of the plate is ........ $^oC$ (Coefficient of linear expansion of steel $ = 12 \times {10^{ - 6}}°C^{-1}$)
If a cylinder of diameter $1.0\, cm$ at $30°C$ is to be solid into a hole of diameter $0.9997\, cm$ in a steel plate at the same temperature, then minimum required rise in the temperature of the plate is ........ $^oC$ (Coefficient of linear expansion of steel $ = 12 \times {10^{ - 6}}°C^{-1}$)
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