Question

The magnetic flux passing through unit area perpendicular to the magnetic field is called \dots

• A. Magnetic flux density
• B. Magnetic flux
• C. Magnetic field
• D. None

Hint:

The SI unit of magnetic flux density is Tesla (T). \[ 1 \text{ Tesla} = 1 \frac{\text{Weber}}{\text{m}^2} \]

Answer 1

The Correct Option is A

Concept: Magnetic flux density represents the amount of magnetic flux passing normally through unit area.

Step 1: Recall the formula. \[ B = \frac{\Phi}{A} \] where:
• $B$ = magnetic flux density
• $\Phi$ = magnetic flux
• $A$ = area perpendicular to the magnetic field

Step 2: Understand the physical meaning. If more magnetic field lines pass through a smaller area, the magnetic flux density becomes greater. Thus, magnetic flux density measures the concentration of magnetic field lines.

Step 3: Identify the correct term. Therefore, magnetic flux passing through unit perpendicular area is called: \[ \boxed{\text{Magnetic flux density}} \] Hence, the correct answer is option (1).