Choose the incorrect statement

Options

A. A switch is the source of electric current in a circuit.
B. A switch help to complete or break the circuit.
C. A switch helps us to use electricity as per our requirement.
D. When the switch is open there is an air gap between its terminals

Explanation

To solve the question "Choose the incorrect statement," we need to analyze each of the four options provided.

### Step-by-Step Solution:

1. **Examine Option 1**:
- The statement is: "A switch is the source of electric current in a circuit."
- Analysis: A switch does not generate electric current; it merely controls the flow of current by opening or closing the circuit. Therefore, this statement is **incorrect**.

2. **Examine Option 2**:
- The statement is: "A switch helps to complete and break the circuit."
- Analysis: This is true. A switch can either complete the circuit (allowing current to flow) or break the circuit (stopping the current). Thus, this statement is **correct**.

3. **Examine Option 3**:
- The statement is: "A switch helps us to use electricity as per your requirement."
- Analysis: This is also true. A switch allows us to turn the electricity on or off based on our needs. Therefore, this statement is **correct**.

4. **Examine Option 4**:
- The statement is: "When the switch is open, there is an air gap between its terminals."
- Analysis: This is correct. When a switch is open, there is indeed an air gap between the terminals, preventing current from flowing. Thus, this statement is **correct**.

### Conclusion:
After analyzing all four options, we find that the **incorrect statement** is **Option 1**: "A switch is the source of electric current in a circuit."