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

Options

A. speed will decrease
B. speed will increase
C. will turn towards left of direction of motion
D. wil turn towards right of direction a motion

Answer

A

Explanation

Find `B` does not applied only force. Field `E` will apply a force opposite to velocity of the electron, hence speed will decrease.