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Byju's Answer
Standard XII
Physics
Magnetic Field
1 A current f...
Question
1
A
current flows through an infinitely long straight wire. The magnetic field produced at a point
1
metres away from it is
A
2
×
10
−
3
T
e
s
l
a
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B
2
10
T
e
s
l
a
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C
2
×
10
−
7
T
e
s
l
a
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D
2
π
×
10
−
6
T
e
s
l
a
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Solution
The correct option is
C
2
×
10
−
7
T
e
s
l
a
B
=
10
−
7
×
2
i
r
=
10
−
7
×
2
×
1
1
=
2
×
10
−
7
T
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0
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