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`=`12times10^(-6)/(^@C)` the difference between their lengths at `20^(@)C` is
(A) 0.024cm
(B) 0.012cm
(C) 0.036cm
(D) 0.048cm

1cm is equal to: (a) 0.1m (b) 0.01m (c) 0.10m (d) 0.001m

In Figure, the perimeter of A B C is (a) 30cm (b) 60cm (c) 45cm (d) 15cm

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 .

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)

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 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 metre rod of silver at 0^(@)C is heated to 100^(@)C . It's length is increased by 0.19 cm. coefficient of volume expansion of the silver rod 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) )

(a) The brass scale of a barometer gives correct reading at 0^(@)C . Coefficient of linear expansion of brass is 2.0xx10^(-5)//^(@)C . The barometer reads 75cm at 27^(@)C . What is the atmospheric pressure at 27^(@)C ? (b) A barometer reads 75.0cm on a steel scale. The room temperature is 30^(@)C . The scale is correctly graduated for 0^(@)C . The coefficient of linear expansion of steel is alpha=1.2xx10^(-5)//^(@)C and the coefficient of volume expansion of mercury is gamma=1.8xx10^(-4)//^(@)C . Find the correct atmospheric pressure.

Consider a metal scale of length 30cm and an object. The scale is calibrated for temp 20^(@)C . (a) What is the actual length of division which is shown as 1cm by scale at 40^(@)C . Given alpha_(s) = 2 xx 10^(-5)//"^(@)C . (b) What will be the reading of scale at 40^(@)C if the actual length of objects is 10cm . (c ) What will be the actual length of object at 40^(@)C if is measured length is 10cm . (d) What is % error in measurement for part (b) and (c). (e) If the linear expansion coefficient of object is alpha_(0) = 4 xx 10^(-5) and neglecting the expansion of scale, then answers of (b) and (c) parts. (f) If alpha_(0) = 4 xx 10^(-5) and alpha_(s) =2xx 10^(-5) then find answers of (b) and (c) part.