The thermo e.m.f. of a thermo -couple is 25 μ V/° C at room temperature. A galvanometer of 40 ohm resistance, capable of detecting current as low as 10⁻⁵ A, is connected with the thermo couple. The smallest temperature difference that can be detected by this system is

Current Electricity: JEE Main 2003 Physics question

JEE Main 2003 · Annual, Paper 1 · Q6447

JEE Main 2003Annual, Paper 1PhysicsMediumCurrent Electricity150× since 2002

The thermo

e.m.f.

of a thermo -couple is

25

\mu V/{}^ \circ C

at room temperature. A galvanometer of

40

ohm

resistance, capable of detecting current as low as

{10^{ - 5}}\,A,

is connected with the thermo couple. The smallest temperature difference that can be detected by this system is

JEE Main 2003 Current Electricity Question with Solution (Annual Paper 1, Q6447) | JEE Arc