What are the SI units of magnetic field induction or magnetic flux density?

Options

A. tesla
B. `weber//meter^(2)`
C. newton / ampere-meter
D. All of these

Explanation

To find the SI units of magnetic field induction or magnetic flux density, we can follow these steps:

### Step 1: Understand the Definition
Magnetic flux density (B) is defined as the amount of magnetic flux (Φ) passing through a unit area (A) that is perpendicular to the magnetic field. Mathematically, it is expressed as:
\[ B = \frac{\Phi}{A} \]

### Step 2: Identify the Units of Magnetic Flux
The unit of magnetic flux (Φ) is the Weber (Wb).

### Step 3: Identify the Units of Area
The unit of area (A) is square meters (m²).

### Step 4: Combine the Units
From the definition of magnetic flux density, we can substitute the units:
\[ B = \frac{\text{Weber}}{\text{meter}^2} \]
Thus, the SI unit of magnetic flux density is:
\[ \text{Weber/m}^2 \]

### Step 5: Relate to Tesla
The unit Weber/m² is also known as Tesla (T), which is the SI unit for magnetic field induction. Therefore:
\[ 1 \, \text{Tesla} = 1 \, \text{Weber/m}^2 \]

### Final Answer
The SI units of magnetic field induction or magnetic flux density are:
\[ \text{Tesla (T)} \text{ or } \text{Weber/m}^2 \]

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