A simple device to maintain a steady current in an electric circuit is the

Options

A. cell
B. resistor
C. electrode
D. None of these

Answer

To solve the question, we need to identify which device is responsible for maintaining a steady current in an electric circuit. Here’s a step-by-step breakdown of the reasoning:

### Step 1: Understand the Concept of Steady Current
- A steady current is defined as a current that does not change over time. It remains constant in magnitude and direction. This type of current is typically referred to as direct current (DC).

**Hint:** Remember that steady current means the current remains constant and does not fluctuate.

### Step 2: Analyze the Options Given
- The options provided are:
1. Cell
2. Register
3. Electrode
4. None of these

**Hint:** Look at the function of each device to determine which one maintains a constant current.

### Step 3: Evaluate Each Option
- **Cell:** A cell (like a battery) provides a constant voltage which can lead to a steady current in a circuit. It is designed to supply a consistent flow of electric charge.

- **Register (Resistor):** A resistor opposes the flow of current, which does not maintain a steady current but rather limits it. It can affect the current but does not maintain it.

- **Electrode:** Electrodes are conductive materials that allow current to flow in an electrolyte solution. They do not inherently maintain a steady current; instead, they facilitate the flow of current depending on the ionic concentration.

- **None of these:** This option suggests that none of the devices listed maintain a steady current, which we can evaluate based on the previous analysis.

**Hint:** Consider how each device interacts with electric current and whether it maintains or alters the flow.

### Step 4: Conclusion
- Based on the analysis, the device that maintains a steady current in an electric circuit is the **Cell**. It provides a constant voltage source that results in a steady current flow.

**Final Answer:** The correct answer is **Cell**.