Question:
According to Biot-Savart's law, the magnetic field B is
According to Biot-Savart's law, the magnetic field B is
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Biot-Savart law is the magnetic analogue of Coulomb's law.
Updated On: Apr 24, 2026
- inversely proportional to the current
- produced by vector source \((I \, d\mathbf{l})\)
- of short range
- directly proportional to the square of the distance
- independent of the distance
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Biot-Savart law: \(d\mathbf{B} = \frac{\mu_0}{4\pi} \frac{I \, d\mathbf{l} \times \mathbf{r}}{r^3}\).
Step 2: Detailed Explanation:
The source of magnetic field is the current element \(I \, d\mathbf{l}\), which is a vector quantity.
Step 3: Final Answer:
Magnetic field is produced by vector source \(I \, d\mathbf{l}\).
Biot-Savart law: \(d\mathbf{B} = \frac{\mu_0}{4\pi} \frac{I \, d\mathbf{l} \times \mathbf{r}}{r^3}\).
Step 2: Detailed Explanation:
The source of magnetic field is the current element \(I \, d\mathbf{l}\), which is a vector quantity.
Step 3: Final Answer:
Magnetic field is produced by vector source \(I \, d\mathbf{l}\).
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