Question

When a current of 1 ampere is passed through a conductor whose ends are maintained at temperature difference of $1{^\circ}C$, the amount of heat evolved or absorbed is called

• A. Peltier coefficient
• B. Thomson coefficient
• C. Thermoelectic power
• D. Thermo e.m.f.

Answer 1

Answer: (B)

Thomson coefficient

Answer 2

$H = \sigma it\Delta\theta$ ⇒ If i = 1 A, ∆θ = 1°C, t = 1sec then

H = σ.