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Byju's Answer
Standard XII
Physics
Motional EMF
Derive an exp...
Question
Derive an expression fort. force acting on a current carrying straight conductor kept in uniform magnetic field. Name the rule used to determine the direction of this force. Under what condition this force is maximum and zero?
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Solution
REF.Image
Vd= drift velocity of
c
∘
Magnetic Lorents force
¯
f
=
−
e
(
¯
V
d
×
¯
B
)
Total force
¯
f
=
N
¯
f
=
n
A
l
[
−
e
(
¯
V
d
×
¯
B
)
]
=
n
A
l
e
(
¯
V
d
×
¯
B
)
I
=
n
A
e
V
d
¯
F
=
I
(
¯
l
×
¯
B
)
=
I
l
B
s
i
n
θ
Maximum at
θ
=
π
2
f
=
I
l
B
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