1. What is Magnetic Flux Density?

Definition: Magnetic flux density (B) is a measure of the strength of a magnetic field, defined as the amount of magnetic flux (Φ) per unit area (A) perpendicular to the magnetic field.

Unit: The SI unit for magnetic flux density is the Tesla (T), named after Nikola Tesla. 1 T = 1 Wb/m².

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( B \) — Magnetic flux density (Tesla)
• \( \Phi \) — Magnetic flux (Weber)
• \( A \) — Area perpendicular to flux (square meters)

Explanation: The magnetic flux is divided by the area to determine how concentrated the magnetic field is in that area.

3. Importance of Magnetic Flux Density

Applications: Used in designing electromagnets, electric motors, MRI machines, and other devices that rely on magnetic fields.

Typical Values:

• Earth's magnetic field: ~50 μT (microtesla)
• Refrigerator magnet: ~5 mT (millitesla)
• MRI machine: 1.5-3 T
• Strong lab magnet: ~20 T

4. Using the Calculator

Tips: Enter the magnetic flux in Webers and the area in square meters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between magnetic flux and flux density?
A: Flux (Φ) is the total magnetic field passing through an area, while flux density (B) is the concentration of that field per unit area.

Q2: What are other units for magnetic flux density?
A: The Gauss (G) is commonly used (1 T = 10,000 G). In CGS system, the unit is maxwell/cm².

Q3: How is Tesla defined in base SI units?
A: 1 T = 1 kg/(s²·A) = 1 N/(A·m) = 1 V·s/m²

Q4: What's the relationship between Tesla and magnetic field strength (H)?
A: B = μH, where μ is the permeability of the medium (μ₀ in vacuum).

Q5: How strong is 1 Tesla in practical terms?
A: Very strong - about 20,000 times stronger than Earth's magnetic field.