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Question
Physics
The magnitude of the magnetic force on a charge is zero when
Q. The magnitude of the magnetic force on a charge is zero when
2201
264
COMEDK
COMEDK 2006
Moving Charges and Magnetism
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A
charge is at rest
14%
B
charge is moving parallel to the field
22%
C
charge is moving perpendicular to the field
14%
D
both when charge is at rest or moving parallel to the field.
50%
Solution:
Magnitude of magnetic force on a moving charge in a external magnetic field is given by
F
=
q
v
B
sin
θ
Here,
F
will be zero if
v
=
0
,
or
θ
=
0
∘
or
18
0
∘