Which of the following is not correct about the BiotSavart law? \( \mathrm{P} \) (1) The magnitu...

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Which of the following is not correct about the BiotSavart law?
\( \mathrm{P} \)
(1) The magnitude of the magnetic field is directly
W
proportional to the current through the conductor
(2) The magnitude of the magnetic field is directly proportional to the length of the current element.
(3) The magnitude of the magnetic field is inversely proportional to the square of the distance from the current element.
(4) The magnitude of the magnetic field is directly proportional to the square of the distance from the current element.
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