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Question
A wire of infinite length carrying current of 10 A is placed along z axis (direction of current is along positive z - axis), then the magnetic field at a point (3,4,0) is
A wire of infinite length carrying current of 10 A is placed along z axis (direction of current is along positive z - axis), then the magnetic field at a point (3,4,0) is
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Solution
The correct option is B (−3.2^i+2.4^j)×10−7 T
B=μ0i2πr=2×10−7×(10)5=4×10−7 T
→B=Bcos θ(−^i)+Bsin θ^j
=B{−4^i5+3^j5}=B5{−4^i+3^j}=4×10−75{−4^i+3^j}
=(−3.2^i+2.4^j)×10−7 T
B=μ0i2πr=2×10−7×(10)5=4×10−7 T
→B=Bcos θ(−^i)+Bsin θ^j
=B{−4^i5+3^j5}=B5{−4^i+3^j}=4×10−75{−4^i+3^j}
=(−3.2^i+2.4^j)×10−7 T
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