An AND gate

Options

A. is equivalent to a parallel switching current
B. is equivalent to a series switching current
C. has two outputs and one inputs
D. has two outputs and two inputs

Answer

### Step-by-Step Solution:

1. **Understanding the AND Gate**:
- An AND gate is a basic logic gate that implements logical conjunction. It has two inputs, typically labeled A and B, and one output, labeled Y.

2. **Output Condition**:
- The output Y of an AND gate can be expressed mathematically as:
\[ Y = A \cdot B \]
- This means that the output Y will be high (1) only if both inputs A and B are high (1). If either input is low (0), the output will also be low (0).

3. **Behavior of the AND Gate**:
- The truth table for an AND gate is as follows:
| A | B | Y (Output) |
|---|---|------------|
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
- From this table, we can see that the output is only high when both inputs are high.

4. **Circuit Representation**:
- The circuit symbol for an AND gate is typically represented as a flat-ended shape with two inputs on the left and one output on the right.

5. **Comparison with Series and Parallel Circuits**:
- An AND gate can be compared to a series circuit. In a series circuit, the current flows only if all components are functioning (similar to both inputs being high).
- In contrast, a parallel circuit (like an OR gate) allows current to flow if at least one component is functioning (similar to any input being high).

6. **Conclusion**:
- Therefore, we conclude that an AND gate is equivalent to a series switching circuit. The correct answer is option B.