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. it will turn towards right of direction of motion
B. it will turn towards left of direction of motion
C. its velocity will decrease
D. its velocity will increase

Answer

C

Explanation

Magnetic field applied parallel to motion of electron exerts no force on it as `theta= 0`. Electric field opposes motion of electron which carries a negative charge
`:'` velocity of electron decreases.