A meter rod made of steel is correct at `0^(@)C` and other meter rod of same material is correct at `30^(@)C` .If `alpha`=`12times``10^(-6)` `/^(@)C`,the difference between their lengths at `20^(@)C` is

A steel tape is correctly calibrated at 20^(@)C and is used to measure the length of a table at 30^(@)C . Find the percentage error in the measurement of length. [alpha_(steel) = 11 xx 10^(-5)//.^(@)C]

Find a_(C) and alpha of the smooth rod of mass m and length l .

Two diagonally opposite corners of a square made of a four thin rods of same material, same dimensions are at temperature 40^(@)C and 10^(@)C . If only heat conduction takes place, then the temperature difference between other two corners will be

An aluminium measuring rod, which is correct at 5^@C measures the length of a line as 80 cm at 45^@C If thermal coefficient of linear expansion of aluminium is 2.50xx10^(-4)//^@C , the correct length of the line is:

A glass rod when measured with a zinc scale, both being at 30^(@)C , appears to be of length 100 cm . If the scale shows correct reading at 0^(@)C , then the true length of glass rod at 30^(@)C and 0^(@)C are :- ( alpha_("glass") = 8 xx 10^(-6)"^(@)C ^(-1), alpha_("zinc") = 26 xx 10^(-6) K^(-1) )

The scale on a steel meter stick is calibrated at 15^@ C . What is the error in the reading of 60 cm at 27^@C ? alpha_(steel) =1.2 xx 10^-5 (.^@ C)^-1 .

Three rods of identical cross - section and length are made of three different material of thermal conductivity k_(1) , k_(2) and k_(3) respectively. They are joined together at their ends to make a long rod (See figure). One end of the long rod is maintained at 100^(@)C and the other at 0^(@)C ( See figure ). If the joints of the rod are at 70^(@)C and 20^(@)C in steady state and there is no loss of energy form the surface of the rod, the correct relationship between k_(1), k_(2) and k_(3) is

A meter scale made of steel is calibrated at 20^@C to give correct reading. Find the distance between 50 cm mark and 51 cm mark if the scale is used at 10^@C . Coefficient of linear expansion of steel is 1.1 xx 10^(-5 @)C^(-1)

A meter scale made of steel is calibrated at 20^@C to give correct reading. Find the distance between 50 cm mark and 51 cm mark if the scale is used at 10^@C . Coefficient of linear expansion of steel is 1.1 xx 10^(-5)C^(-1)

What is the percentage change in length of 1m iron rod it its temperature changes by 100^(@)C. alpha for iron is 2 xx 10^(-5)//"^(@)C .