AP EAMCET · PHYSICS · Thermal Properties of Matter
The cold junction of a thermocouple is at \(0^{\circ} \mathrm{C}\). The thermo e.m.f produced in the thermocouple is given by an equation \(E=16 T-0.04 T^2\), where \(T\) is the temperature of the hot junction. The temperature of inversion and neutral temperature of the thermocouple are
- A \(200^{\circ} \mathrm{C} ; 400^{\circ} \mathrm{C}\)
- B \(400^{\circ} \mathrm{C} ; 200^{\circ} \mathrm{C}\)
- C \(200^{\circ} \mathrm{C} ; 300^{\circ} \mathrm{C}\)
- D \(300^{\circ} \mathrm{C} ; 200^{\circ} \mathrm{C}\)
Answer & Solution
Correct Answer
(B) \(400^{\circ} \mathrm{C} ; 200^{\circ} \mathrm{C}\)
Step-by-step Solution
Detailed explanation
Thermo emf \(E=16 T-0.04 T^2\) At inversion temperature \(\left(T i\right), E=0\) \[ \therefore \quad \begin{aligned} 0 & =16 T_i-0.04 T_i^2 \\ 16 T i & =0.04 T_i^2 \\ T i & =\frac{16}{0.04}=400^{\circ} \mathrm{C} \end{aligned} \] Neutral temperature \(T_n=\frac{T i+T}{2}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- If the values of the temperature of a body in Fahrenheit and Celcius scales are in the ratio of \(13: 5\), then the temperature of the body isAP EAMCET 2025 Easy
- A particle is executing simple harmonic motion with amplitude A. At a distance ' \(x\) ' from the mean position, when the particle is moving towards extreme position it receives a blow in the direction of motion which instantaneously doubles its velocity. The new amplitude of the particle is (Frequency is constant during the motion)AP EAMCET 2025 Medium
- Assertion (A) The impact parameter for \(\alpha\)-particles by \(180^{\circ}\) is zero.
Reason (R) Zero impact parameter means that the \(\alpha\)-particles tend to hit the centre of the nucleus.AP EAMCET 2021 Medium - Brakes stop a train in a certain distance \(x\). If the force of these brakes is reduced to one fourth of its original force, the train needs the original distance \(x\) to stop.AP EAMCET 2020 Medium
- A AC is applied to a circuit consisting of a resistor and a coil with negligible resistance. If the voltage across the resistor is , the voltage across the coil isAP EAMCET 2021 Medium
- A diffraction pattern is obtained by using a beam of red light. If the red light is replaced by the blue lightAP EAMCET 2023 Medium
More PYQs from AP EAMCET
- A plane electromagnetic wave of wavelength \(3.0 \mathrm{~m}\) travels in vaccum along the positive \(\mathrm{X}\)-axis. The electric field of amplitude \(300 \mathrm{Vm}^{-1}\) oscillates parallel to the Y-axis. Then the intensity of the wave is \(\left(\mu_0=4 \pi \times 10^{-7} \mathrm{Hm}^{-1}, \mathrm{c}=3 \times 10^8 \mathrm{~ms}^{-1}\right)\)AP EAMCET 2017 Easy
- If \(\int \frac{d x}{2 \cos x+3 \sin x+4}=\frac{2}{\sqrt{3}} f(x)+c\), then \(f\left(\frac{2 \pi}{3}\right)=\)AP EAMCET 2025 Medium
- A particle moving in \(\mathrm{x}-\mathrm{y}\) plane starts from the origin at \(\mathrm{t}=0\) with an initial velocity \((-\hat{\mathrm{i}}+\hat{\mathrm{j}}) \mathrm{ms}^{-1}\) and undergoes an acceleration of \((6 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \mathrm{ms}^{-2}\). It's displacement after \(2 \mathrm{~s}\) isAP EAMCET 2022 Hard
- The harmonic conjugate of \((2,3,4)\) with respect to the points \((3,-2,2),(6,-17,-4)\) isAP EAMCET 2016 Medium
- If the coefficients of the equation whose roots are \(k\) times the roots of the equation, \(x^3+\frac{1}{4} x^2-\frac{1}{16} x+\frac{1}{144}=0\) are integers, then a possible value of \(k\) isAP EAMCET 2016 Easy
- The area (in sq units) enclosed by the loop of the curve \(a y^2=x^2(a-x),(a>0)\) isAP EAMCET 2019 Medium