When a proton is released from rest in a room, it starts with an initial acceleration a0 towards west. When it is projected towards north with a speed v0 it moves with an initial acceleration 
toward west. The electric and magnetic fields in the room are
A
east, 
up
B
east, 
down
C
west, 
up
D
west, 
down.
Text Solution
Verified by ExpertsThe correct answer is:
D
or 
or, 
towards west
The acceleration changes from 
to 
Hence net acceleration produced by magnetic field vector 
is 
.
Force due to magnetic field
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