The equivalent quantity of mass in electricity is

Options

A. current
B. self inductance
C. potential
D. charge

Answer

To solve the question regarding the equivalent quantity of mass in electricity, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Energy in Inductors**:
The energy (E) stored in an inductor is given by the formula:
\[ E = \frac{1}{2} L I^2 \]
where \(L\) is the inductance and \(I\) is the current flowing through the inductor.

2. **Compare with Mechanical Energy**:
In mechanics, the kinetic energy (E) of an object is given by:
\[ E = \frac{1}{2} m v^2 \]
where \(m\) is the mass of the object and \(v\) is its velocity.

3. **Identify the Similarities**:
By comparing the two equations, we can see that both expressions have a similar form:
\[ \frac{1}{2} L I^2 \quad \text{and} \quad \frac{1}{2} m v^2 \]
This suggests a relationship between inductance (L) and mass (m).

4. **Establish the Relationship**:
From the comparison, we can conclude that:
\[ L \equiv m \]
This indicates that the inductance (L) can be considered as the equivalent of mass in the context of electricity.

5. **Conclusion**:
Therefore, we can state that the equivalent quantity of mass in electricity is the self-inductance (L). This concept is also referred to as electric inertia.

### Final Answer:
The equivalent quantity of mass in electricity is the self-inductance (L), also known as electric inertia.

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