MEDIUM
12th West Bengal Board
IMPORTANT
Earn 100

What do you mean by Peltier effect? What is the difference between Joule effect and Peltier effect? Mention one practical application of Peltier effect. 

Important Questions on Thermal Effect and Chemical Effect of Current

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 10
What is a thermocouple? Give two application of thermocouple. If the temperature of the cold junction of a thermocouple is lowered, what will be the effect on its 'neutral temperature' and 'temperature of inversion'?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 11
How can you explain the thermoelectric current and the Peltier effect from the assumption that every metal contains free electrons.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 12
State and explain Faraday's laws of electrolysis.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 13
Obtain from Faraday's laws of electrolysis the relation between electrochemical equivalent and chemical equivalent of an element.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 14
Show that the maximum efficiency of a battery of emf E and internal resistance r delivering current to an external resistance is 50%.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 1
If 20C of electric charge flows across a potential difference of 220 V, how much work is done? The charge flows through a resistor, how much heat will be generated in it? J=4.2 J/Cal.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 2
How much heat is developed when a current of 0.8 A flows through a resistor of 10Ω for 1 minute?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 3
A current flows through a 10Ω coil for 10 minutes and the heat developed is completely supplied to 100 g of water. If the temperature of water rises from 15°C to 75°C, calculate the current strength.