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

Option: 1

Will turn towards left of direction of motion


Option: 2

Will turn towards right of direction of motion


Option: 3

Speed will decrease


Option: 4

Speed will increase


Answers (1)

best_answer

As we learnt in

Magnetic force If θ = 0° or θ = 180° -

F=qVB\sin \theta

F=0

-

 

Magnetic field applied parallel to motion of electron exerts no force on it as \Theta =0 and force  = Bevsin \Theta = zero

Electric field opposes motion of electron which carries a negative charge

\therefore   velocity of electron decreases.

Posted by

shivangi.bhatnagar

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