The thermo e.m.f. E in volts of a certain thermocouple is found to vary

⇦

⇨

The thermo e.m.f. E in volts of a certain thermocouple is found to vary with temperature difference θ in ⁰C between the two junctions according to the relation
E = 30θ – θ² / 15
The neutral temperature for the thermocouple will be

Options

(a) 30⁰C
(b) 450⁰C
(c) 400⁰C
(d) 225⁰C

Correct Answer:

225⁰C

Explanation:

E = 30θ – θ² / 15
For neutral temperature, dE/ dθ = 0
0 = 30 – 2/15 . θ
θ = 15 x 15
= 225⁰C

Related Questions:

1. If the magnetising field on a ferromagnetic material is increased, its permeability
2. An object is placed at a distance of 10 cm from a co-axial combination of two lenses
3. What is the energy of He⁺ electron in first orbit?
4. Consider a two particle system with particle having masses m₁ and m₂. If the first
5. If |A x B|= √3 A.B , then the value of |A + B| is

Topics: Current Electricity (136)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends