Thermoelectric effect

In thermopile,number of thermocouples are connected in

• Series

• Parallel

• Either series or parallel

• Nothing can be said

When current flows through a conductor,heat is produced.This is known as

• Seebeck Effect

• Peltier Effect

• Joule's Effect

• Thomson Effect

Conversion of heat into electrical energy is achieved by using

• Hydrometer

• Voltmeter

• Photoelectric Tube

• Thermocouple

Tags

NGSS.HS-PS3-3

The temperature of the cold junction of a thermocouple is 0º C and its neutral temperature is 275º C. If the temperature of the cold is changed to 20º C, the neutral temperature and the temperature of inversion will be respectively

• 265º C and 550º C

• 265º C and 530º C

• 275º C and 530º C

• 275º C and 550º C

Tags

NGSS.HS-PS3-4

The metal which does not exhibit Thomson effect is

• Iron

• Nickel

• Copper

• Lead

Consider the following statements regarding a thermocouple.

(A) The neutral temperature does not depend on the temperature of the cold junction.

(B) The inversion temperature does not depend on the temperature of the cold junction.

• Both A and B are correct

• A is correct but B is wrong

• B is correct but A is wrong

• Both A and B are wrong.

Which of the following statements is correct?

• Seeback effect is irreversible

• Thomson effect is localized at the junction

• Joule heating effect is independent of the direction of flow of current in a conductor

• Thomson effect is similar in origin to Peltier effect. They both are due to non-uniform distribution of electrons in a metal.

Tags

NGSS.HS-PS3-4

The emf in a thermoelectric circuit with one junction at 0 and the other at t°C is given by E = at + bt². The neutral temperature is

• 
  $\frac{2b}{a}$

• $\frac{a}{b}$

• $\frac{-a}{b}$

• $\frac{-a}{2b}$

Tags

NGSS.HS-PS3-4

When different parts of a metal are kept at different temperatures and current is passed through it, heat is either evolved or absorbed. This effect is called

• Thomson effect

• Seebeck effect

• Peltier effect

• None of these.

Tags

NGSS.HS-PS3-4

3. Consider the following two statements.

(A) Free electron density is different in different metals.

(B) Free electron density in a metal depends on temperature.

Seebeck Effect is caused by

• Due to both A and B

• Due to A but not due to B

• Due to B but not due to A

• Neither due to A nr due to B.