Heat and Thermal ExpansionHard
Question
The thermo e.m.f. of a thermo-couple is 25 μV/oC at room temperature. A galvanometer of 40 ohm resistance, capable of detecting current as low as 10-5 A, is connected with the thermocouple. The smallest temperature difference that can be detected by this system is
Options
A.16oC
B.12oC
C.8oC
D.20oC
Solution
E = 25 θ × 10-6V
IR = 10-5 × 40 = 4 × 10-4V
= 16oC
IR = 10-5 × 40 = 4 × 10-4V
= 16oCCreate a free account to view solution
View Solution FreeMore Heat and Thermal Expansion Questions
Time taken by a 836 W heater to heat one litre of water from 10oC to 40oC is...During experiment, an ideal gas is found to obey a condition P2/ρ = constant [ρ density of the gas]. The gas i...If mass - energy equivalence is taken into account, when water is cooled to from ice the mass of master should :-(Note :...Certain prefect gas is found to obey PVn = constant during adiabatic process. The volume expansion cofficient at tempera...1023 molecules of a gas strike a target of area 1 m2 at angle 45o to normal and rebound elastically with speed 1 kms-1. ...