Question
A disc of radius $R$ has a hole of radius $r$ in it. The disc is heated then(a) $R$ and $r$ both increase(b) $R$ increases, $r$ decreases(c) $R$ decreases, $r$ increases(d) $\mathrm{R}$ and $r$ both will decrease
Step 1
When a material is heated, it generally expands. This is due to the increase in kinetic energy of the particles in the material, which causes them to move more and occupy a larger volume. Show more…
Show all steps
Your feedback will help us improve your experience
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A sphere, a disc and a ring of same metal and same radius are heated. Then (a) increase in radius for same rise in temperature is same for solid sphere, a disc and a ring of same radius (b) increase in radius of sphere is largest and that of ring is least (c) increase in radius is maximum for ring and least for sphere (d) the expansion of radii of sphere, disc and ring have no relation between them
Thermometry and Thermodynamics
Section C
If equal heat is given to all the three then the increase in radii $A R_{s}$ for sphere, $A R_{d}$ for disc and $\ R_{\mathrm{r}}$ for ring are related as : (a) $A R_{s}>\lambda R_{d}>A R_{r}$ (b) $A R_{s}<A R_{d}<A R_{\gamma}$ (c) $A R_{s}=A R_{d}=A R_{F}$ (d) No relation between them
Part of an annular steel ring is cut off leaving a C shaped disc. Does the size of the resulting gap increase, decrease or remain the same as the disc is heated? Give reasons.
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD