+91-8076753736[email protected]
logo
logo
-->

Electric Charges And Fields

Question
CBSEENPH12039923
Wired Faculty App

The rate of increase of thermo - emf with temperature at the neutral temperature of a thermocouple

  • is zero

  • depends upon the choice of the two materials of the thermocouple

  • is negtive

  • is positive

Solution

A.

is zero

We have 
e = at +bt2
de over dt space equals space straight a space plus 2 bt Natural space temprature space straight T subscript straight n space equals space minus fraction numerator straight a over denominator 2 straight b end fraction At space netural space temperature de over dt space equals space 0 

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point? 

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation