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VITEEE 2019 Solved Paper
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© examsnet.com
Question : 38
Total: 125
The work done by an uniform magnetic field, on a moving charge is
zero because
→
F
acts parallel to
→
v
positive because
→
F
acts perpendicular to
→
v
zero because
→
F
acts perpendicular to
→
v
negative because
→
F
acts parallel to
→
v
Validate
Solution:
Force on moving charge while moving in magnetic field is;
→
F
=
q
(
→
v
×
→
B
)
where
→
F
is perpendicular to
→
v
.
Work done/sec =
→
F
.
→
v
= Fv cos 90°= 0
© examsnet.com
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