Question

If the current flows in a conductor AB from one end A to the other end B, the charge carriers in motion will be ………
A. protons from the end A to B
B. electrons from the end A to B
C. protons from the end B to A
D. electrons from the end B to A

Answer 1

Hint: In the case of conductors, the electrons are the charge carriers which are negatively charged particles. And also as per the conventions, the direction of current is found to be along the direction of flow of positive charges. This information will help you in solving the question.

Complete answer:
In the case of conductors, the electrons are the charge carriers which are negatively charged particles. Electrons as already mentioned which are negatively charged particles, will flow from the negative terminal to the positive terminal of the voltage source. Hence the actual direction of the current will be from the negative to the positive terminal. So, the current flow is assumed to be in the direction opposite to the direction of flow of electrons. Here it is mentioned that the current flow is from A to B. therefore the proton flow will be in the same direction and also the electron flow will be in the opposite direction. Thus the electron flow will be from B to A.

So, the correct answer is “Option D”.

Note:
As per the conventions, the direction of the current is found to be along the direction of motion of positive charges. The positive charged particles in an atom is the proton. Therefore the electrical current will be in the direction of the flow of protons. The electrical current in the circuit will be starting from the positive terminal and moving towards the negative terminal of the battery.