A particle with charge 
and mass 
, moving under the influence of a uniform electric field 
and a uniform magnetic field Bk, follows a trajectory from P to Q as shown. The velocities at P and Q are Vi and 
. Choose the wrong statement.
A
B
The rate of work done by the electric field at P is 
C
The rate of work done by the electric field at P is 0 .
D
The rate of work done by both the fields at Q is 0
Text Solution
Verified by ExpertsThe correct answer is:
C
, , , in going from P to Q increase in kinetic energy
work done by electric field.
or 
or 
The rate of work done by E at 
force due to 
velocity.
At 
is perpendicular to 
and 
, and no work is done by either field
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