Moving Charges and Magnetism

Question: At a distance of $10 cm$ from a long straight wire carrying current, the magnetic field is $0.04 T$. At the distance of $40 cm$, the magnetic field will be

1) $0.01 T$

2) $0.02 T$

3) $0.08 T$

4) $0.16 T$

Solution:

Explanation: No Explanation

Biot-Savart's Law Amperes Law

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