Which of the following is defined as the amount of electric charge that flows through any region of the conducting medium concerning time?

Options

A. Electric Current
B. Electric Charge
C. Electric Flux
D. Mobility

Explanation

To solve the question, we need to identify which term is defined as the amount of electric charge that flows through a conducting medium concerning time. Let's break it down step by step:

### Step 1: Understand the Definitions
- **Electric Charge (q)**: This is a property of matter that causes it to experience a force when placed in an electromagnetic field. It is measured in coulombs (C).
- **Electric Current (I)**: This is defined as the rate at which electric charge flows through a conductor. It is measured in amperes (A).
- **Electric Flux**: This refers to the quantity of electric field lines passing through a surface. It is not related to the flow of charge.
- **Mobility**: This is a measure of how quickly an electron or hole can move through a semiconductor material when an electric field is applied.

### Step 2: Relate Current to Charge and Time
The relationship between electric current (I), electric charge (q), and time (t) is given by the formula:
\[ I = \frac{q}{t} \]
Where:
- \( I \) is the electric current,
- \( q \) is the electric charge, and
- \( t \) is the time.

### Step 3: Analyze the Options
Given the options:
1. Electric Current
2. Electric Charge
3. Electric Flux
4. Mobility

From our understanding:
- Electric current is defined as the amount of electric charge that flows through a region of a conducting medium concerning time. Therefore, it matches the definition provided in the question.

### Step 4: Conclusion
Based on the definitions and the relationship between current, charge, and time, the correct answer is:
**Electric Current** (Option 1).

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