Question

In a cell, electrons move from
a)Positive electrode to negative electrode
b)Negative electrode to positive electrode
c)Both A and B
d)Electrons do not move and only negative charge moves from one place to another place.

Answer 1

Hint:Remember that an atom is made up of three particles of different charges. Positive, negative, and neutral. Negatively charged particles are called electrons, positively charged particles are called protons, and neutral particles are called neutrons. Particles of similar charges attract each other whereas particles of opposite charge repel each other.

Complete step by step answer:
We know that a cell has a positive electrode and a negative electrode as shown in the figure below:-

a) We know that electrons are negatively charged particles and protons are positively charged particles. We can assume that the negative electrode of the cell has a concentration of negatively charged electrons on it.
b) And since opposite charges attract each other the negatively charged electrons move toward the positively charged electrode.
c)In an electrode only the electrons move not the protons this is because protons are present in the nucleus of an atom and therefore they cannot move freely outside the atom as electrons do.
d)Therefore, it gets attracted to the positive electrode of the cell. So, in a cell, the electrons move from negative electrodes to positive electrodes.
Therefore, the answer is option B.
Additional information: The charged particles carrying positive charge are called holes just like electrons that carry a negative charge. These holes may be caused by an ion leaving its respect space in the lattice. The movement of these positively charged holes in the lattice may also give rise to current.

Note: In a cell, the electrodes play an important role in the movement of electrons from one electrode to the other electrode. Particles of similar charges attract each other whereas particles of opposite charge repel each other. This gives rise to an electric current for which the cell is used.