A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then :

Question

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then : (A) its velocity will decrease (B) its velocity will increase (C) it will turn towards right of direction of motion (D) it will turn towards left of direction of motion

Tardigrade Admin · Accepted Answer

When E, V and B are all along same direction, then magnetic force experienced by electron is zero while electric force is acting opposite to velocity of electron, so velocity of electron will decrease.

Q. A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then :

its velocity will decrease

its velocity will increase

it will turn towards right of direction of motion

it will turn towards left of direction of motion

When $E$ , $V$ and $B$ are all along same direction, then magnetic force experienced by electron is zero while electric force is acting opposite to velocity of electron, so velocity of electron will decrease.