MagnetismHard
Question
A uniform electric field and a uniform magnetic field are acting along the same direction ina certain region. If an electron is projected in the region such that its velocity is pointedalong the direction of fields, then the electron
Options
A.will turn towards right of direction of motion
B.speed will decrease
C.speed will increase
D.will turn towards left of direction of motion
Solution
Force on electron due to electric field ,
Force on electron due to magnetic field
Since
are in the same direction
Total force on the electron,
Electric field apposes the motion of the electron, hence speed of the electron will decreases.
Force on electron due to magnetic field
Since
are in the same direction Total force on the electron,
Electric field apposes the motion of the electron, hence speed of the electron will decreases.
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