Class 12th Physics!
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Derive an expression for the magnetic field due to straight current carrying conductor ?
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EXPLANATION.
Expression for the magnetic field due to straight current carrying conductor.
As we know that,
⇒ θ + Φ + 90° = 180°.
⇒ θ = 90° - Ф.
BIOT savart law.
|dB| due to current element.
Net magnetic field (B).
In ΔAPB.
⇒ cos(Ф) = a/r.
⇒ r = a/cos(Ф).
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