Question

The line integral of the magnetic field around a closed loop is directly proportional to the ________.

• A. current enclosed
• B. charge enclosed
• C. voltage across the loop
• D. length of the loop
• E. electric field around the loop

Hint:

Ampere's Law is the magnetic equivalent of Gauss's Law in electrostatics.

Answer 1

The Correct Option is A

Step 1: Concept
This is defined by Ampere's Circuital Law.

Step 2: Meaning
The law relates magnetic fields to the electric currents that produce them.

Step 3: Analysis
$\oint B \cdot dl = \mu_0 I_{enclosed}$.

Step 4: Conclusion
The integral is directly proportional to the total current passing through the surface bounded by the loop. Final Answer: (A)