The SI unit of magnetic energy is ?

Options

A. Tesla
B. Ampere Metre
C. Coulomb Metre
D. Joule

Explanation

To determine the SI unit of magnetic energy, we can follow these steps:

### Step 1: Understand the Concept of Energy
Energy is a scalar quantity that represents the capacity to do work. It exists in various forms, including kinetic energy, potential energy, thermal energy, and magnetic energy.

**Hint:** Remember that energy can be in different forms, but the unit for measuring energy remains the same.

### Step 2: Identify the SI Unit of Energy
The standard unit of energy in the International System of Units (SI) is the joule, denoted by the symbol 'J'. This unit applies to all forms of energy, including magnetic energy.

**Hint:** Recall that joule is the common unit for measuring energy, regardless of its type.

### Step 3: Relate to Magnetic Energy
Magnetic energy is a form of energy associated with magnetic fields. Just like other forms of energy, magnetic energy is measured in joules.

**Hint:** Consider how magnetic fields can do work, which relates back to the concept of energy.

### Step 4: Conclusion
Based on the understanding that the SI unit of energy is joule, we conclude that the SI unit of magnetic energy is also joule.

**Final Answer:** The SI unit of magnetic energy is joule (J).

### Summary of Steps:
1. Understand that energy is a capacity to do work.
2. Identify that the SI unit of energy is joule (J).
3. Recognize that magnetic energy, like all energy forms, is measured in joules.
4. Conclude that the SI unit of magnetic energy is joule (J).