Expansion during heating
occurs only in solids
increases the weight of a material
generally decreases the density of a material
occurs at the same rate for all liquids and solids
Get Answer
Solids, liquids and gases all expand on being heated; as a result density ( mass/volume) decreases.
Which of the following will expand the most for same rise in temperature?
Aluminium
Glass
Wood
All will expand same
Among glass, wood and metals, metals expand more for same rise in temperature.
If and are coefficient of linear, area and volume expansion respectively, then
and terms are neglected.
.
On heating a liquid of coefficient of cubical expansion . in a container having coefficient of linear expansion 3 , the level of liquid in the container will
rise
fall
remain almost stationary
It is difficult to say
As coefficient of cubical expansion of liquid equals coefficient of cubical expansion of vessel, the level of liquid will not change on heating.
An iron tyre is to be fitted on to a wooden wheel in diameter. The diameter of tyre is smaller than that of wheel. The tyre should be heated so that its temperature increases by a minimum of (the coefficient of cubical expansion of iron is )
Initial diameter of tyre , so initial radius of tyre
and change in diameter so
After increasing temperature by tyre will fit onto wheel Increment in the length (circumference) of the iron tyre
A metal sheet with a circular hole is heated. The hole
gets larger
gets smaller
remains of the same size
gets deformed
The area of circular hole increases when we heat the metal sheet & expansion of metal sheet will be independent of shape & size of the hole.
A bimetallic strip consists of metals A and B. It is mounted rigidly as shown. The metal has higher coefficient of expansion compared to that of metal B. When the bimetallic strip is placed in a cold bath, it will:
Bend towards the left
Bend towards the right
Not bend but shrink
Neither bend nor shrink
Since metal has higher coefficient of expansion compared to that of metal , so will contract more than , and hence it will bend towards left.
A glass flask is filled up to a mark with of mercury at . If the flask and contents are heated to , how much mercury will be above the mark? ( for glass is and coefficient of real expansion of mercury is )
Due to volume expansion of both mercury and flask, the change in volume of mercury relative to flask is given
by
A bar of iron is at . At it will be ( of iron )
longer
shorter
Two marks on a glass rod apart are found to increase their distance by when the rod is heated from to . A flask made of the same glass as that of rod measures a volume of at . The volume it measures at in is
1002.4
1004.2
1006.4
1008.2
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