Question

why do electrons move from the negative end of the tube to the positive end

Answer 1

Answer:

Electrons are negatively charged, and so are attracted to the positive end of a battery and repelled by the negative end. So when the battery is hooked up to something that lets the electrons flow through it, they flow from negative to positive.

Answer 2

Electrons from the negative terminal to the positive end because of the following reasons:

• First of all, electrons always have a tendency to travel opposite to the direction of the electric field intensity.
• Similarly, electrons also have a tendency to travel in the opposite direction as compared to that of the electric field lines.
• Another reason can be : they are repelled from the negative terminal and attracted by the positive terminal.
• That is why, direction of flow of electrons is always opposite to the direction of flow of current in a circuit.

$\star$ Hope It Helps.