MCQ
Neutral temperature of a thermocouple is defined as the temperature at which
  • A
    The thermo e.m.f. changes sign
  • The thermo e.m.f. is maximum
  • C
    The thermo e.m.f. is minimum
  • D
    The thermo e.m.f. is zero

Answer

Correct option: B.
The thermo e.m.f. is maximum
(b)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Two identical spring of constant $K$ are connected in series and parallel as shown in figure. A mass $m$ is suspended from them. The ratio of their frequencies of vertical oscillations will be

Image

Image

Two bodies of masses $m$ and $2 m$ have same momentum. Their respective kinetic energies $E_1$ and $E_2$ are in the ratio
Adjacent figure shows the force-displacement graph of a moving body, the work done in displacing body from $x=0$ to $x=35 \mathrm{~m}$ is equal to
Image
A galvanometer having a coil resistance of $100\ \Omega$. gives a full scale deflection, when a currect of $I\ mA$ is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of $10\ A$, is :......$Ω$
The radius of the convex surface of plano-convex lens is $20 \mathrm{~cm}$ and the refractive index of the material of the lens is $1.5.$ The focal length of the lens is
Two rods of same length and material transfer a given amount of heat in 12 seconds, when they are joined end to end. But when they are joined lengthwise, then they will transfer same heat in same conditions in
When $100$ volt $dc$ is applied across a coil, a current of $1$ amp flows through it. When $100$ volt $ac$ at $50$ cycle $S^{-1}$ is applied to the same coil, only $0.5$ ampere current flows. The impedance of the coil is
$L, \quad C$ and $R$ denote inductance, capacitance and resistance respectively. Pick out the combination which does not have the dimensions of frequency
Two Carnot engines $A$ and $B$ are operated in succession. The first one, $A$ receives heat from a source at $T_1=800 \mathrm{~K}$ and rejects to sink at $T_2 K$. The second engine $B$ receives heat rejected by the first engine and rejects to another sink at $T_3=300 \mathrm{~K}$. If the work outputs of two engines are equal, then the value of $T_2$ is
The adiabatic elasticity of hydrogen gas $(\gamma=1.4)$ at NTP is