Kirchhoff S Laws

Kirchhoff's junction law is based on the conservation of charge, stating that the total current entering a junction is equal to the total current leaving the junction. This reflects the principle of conservation of electric charge. Thus, the correct answer is option (3).

Step 1: Understanding Tesla.
Tesla is the SI unit used to measure magnetic flux density, also known as magnetic field strength. It is defined as one weber per square meter. Step 2: Formula for magnetic flux density.
Tesla (T) measures the magnetic flux density, which is the amount of magnetic flux passing through a unit area perpendicular to the direction of the magnetic field. Step 3: Conclusion.
Thus, Tesla is the unit of magnetic flux density (not just magnetic field strength) in the International System of Units (SI).