The SI units of magnetising force or magnetising intensity are same as those of

Options

A. magnetic induction
B. intensity of magnetisation
C. magnetic susceptibility
D. none of the above

Answer

To solve the question regarding the SI units of magnetizing force or magnetizing intensity, we can follow these steps:

### Step 1: Understand the Definitions
- **Magnetizing Force (H)**: It is the magnetic field strength required to magnetize a material. It is defined as the amount of magnetizing current per unit length of the magnetic circuit.
- **Magnetizing Intensity**: It is often represented as \( H \) and is calculated using the formula \( H = \frac{m}{V} \), where \( m \) is the magnetic moment and \( V \) is the volume of the material.

### Step 2: Identify the SI Units
- The SI unit of **magnetic moment (m)** is Am² (Ampere square meter).
- The SI unit of **volume (V)** is m³ (cubic meter).

### Step 3: Calculate the SI Unit of Magnetizing Intensity
Using the formula for magnetizing intensity:
\[ H = \frac{m}{V} \]
Substituting the units:
\[ \text{Unit of } H = \frac{\text{Am}^2}{\text{m}^3} = \text{A/m} \]
Thus, the SI unit of magnetizing force or magnetizing intensity is **A/m** (Ampere per meter).

### Step 4: Conclusion
The SI units of magnetizing force or magnetizing intensity are the same as those of **electric field strength**, which is also measured in A/m.

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