Electric cells are a common source of electric energy for many equipment. Electric cells are used in transistors, calculators, wristwatches, remotes, toys, clocks, cameras, video games, etc. An electrochemical cell is a device which by converting chemical energy into electrical energy maintains the flow of charge in a circuit. It usually consists of two electrodes of different materials and an electrolyte. The electrode at higher potential is called anode and the one at lower potential is cathode
Primary Cells: The cells which cannot be recharged electrically are called primary cells. Here the original state of cell cannot be brought back by passing electrical energy through cell from external source after cell is discharged. the examples are Voltaic cell, Daniel cell, Leclanche cell, manganese-alkaline cell, mercury button cell etc.
Secondary Cells: The cells in which chemical process is reversible are called secondary cells. Here original chemical state of the cell can be brought back by passing electrical energy through cell from external source. The examples are Lead acid accumulator, alkali cells etc.
1. Electric cells are light so they are portable (can be carried easily).
2. They produce a very small amount of electricity so they are perfectly safe and one can handle them without receiving electric shocks.
3. They are not very costly.
4. They do not contain any liquid chemicals that can be spilled.
5. They supply a steady electric current.
The porous pot in Leclanche's contains ________ with a carbon rod dipped in it. | |||
Right Option : C | |||
View Explanation |
The unit of e.m.f. of a cell is ___________________. | |||
Right Option : B | |||
View Explanation |
Cells can be divided into two categories depending on __________________.
| |||
Right Option : A | |||
View Explanation |
My experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.