Electric conduction takes place in a discharge tube due to the movement of

(a) positive ions
(b) negative ions
(c) electrons
(d) protons

Choose the correct option 

1. (a),(b), (c)

2. (b), (c), (a)

3. (c),(d), (b)

4. (a), (d), (b)

Choose the option 

1. (a) only 

2. (b), (c)

3. (c), (d)

4. (a), (d)

An electrolysis experiment is stopped and the battery terminals are reversed.
(a) The electrolysis will stop.
(b) The rate of liberation of material at the electrodes will increase.
(c) The rate of liberation of material will remain the same.
(d) Heat will be produced at a greater rate
Choose the option

1. (a), (b)

2. (b), (c)

3. (c) only

4. (a), (d) 

(a) there will be no neutral temperature
(b) there will be no inversion temperature
(c) there will not be any thermo-emf even if the junctions are kept at different temperatures
(d) there will be no current in the thermocouple even if the junctions are kept at different temperatures.

Choose the option 

1. (a), (b)

2. (b), (c)

3. (c), (d)

4. (a), (d)

A copper strip AB and an iron strip AC are joined at A. The junction A is maintained at 0°C and the free ends B and C are maintained at 100°C. There is a potential difference between

(a) the two ends of the copper strip
(b) the copper end and the iron end at the junction
(c) the two ends of the iron strip
(d) the free ends B and C

Choose the option 

1. (a), (b)

2. (b), (c)

3. (c), (d)

4. All of these

Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval,

Choose the correct option: 
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (a), (d)

Faraday constant

1.   depends on the amount of the electrolyte

2.   depends on the current in the electrolyte

3.    is a universal constant

4.   depends on the amount of charge passed through the electrolyte

(A) Free-electron density is different in different metals.
(B) Free electron density in a metal depends on temperature.

Consider the statements A and B in the previous question. Peltier effect is caused

1.  due to both A and B

2.  due to A but not due to B

3.  due to B but not due to A

4.  neither due to A nor due to B

Previous question: Consider the following two statements.
(A) Free-electron density is different in different metals.
(B) Free electron density in a metal depends on temperature.

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

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

Seebeck effect is caused

1.  due to both A and B

2.  due to A but not due to B

3.  due to B but not due to A

4.  neither due to A nor due to B.