Explain the input and output characteristics curves for a common emitter transistor.

Explanation

### Step-by-Step Solution:

**Step 1: Understanding Input Characteristics**
- The input characteristics of a common emitter transistor represent the relationship between the base current (IB) and the base-emitter voltage (VBE).
- To analyze this, we plot a graph with the base current (IB) on the y-axis and the base-emitter voltage (VBE) on the x-axis, while keeping the collector-emitter voltage (VCE) constant.

**Step 2: Drawing the Input Characteristic Curve**
- When VBE is less than the barrier potential (approximately 0.6V for silicon transistors), the base current is very small and nearly zero.
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