Answer :
An electron is placed in a uniform electric field that is directed towards the right side of the page. The direction of force on the electron is towards the left.
Electron is a subatomic particle which carries a negative charge. The mass of the electron is less than the mass of proton and neutron. But the charge of an electron is equal and opposite to the charge of a proton i.e, they only differ by a negative sign.
The electron will move in the opposite direction of the electric field due to its negative charge. So, it will move towards the left.
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