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# An uniform electric field and an 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

$\begin {array} {1 1} (a)\;\text{ its velocity will decrease}\\ (b)\;\text{its velocity will increase} \\ (c)\;\text{it will turn towards right of direction of motion} \\ (d)\;\text{ it will turn towards left of direction of motion} \end {array}$

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.
Ans : (a)