Question

For a transistor if \(\alpha = 0.98\) and emitter current is \(2.8\,mA\), then the collector current is

• A. \(0.44\,mA\)
• B. \(0.88\,mA\)
• C. \(2.74\,mA\)
• D. \(3.32\,mA\)

Hint:

\(\alpha\) is ratio of collector to emitter current.

Answer 1

The Correct Option is C

Concept: \[ \alpha = \frac{I_C}{I_E} \Rightarrow I_C = \alpha I_E \]

Step 1: Given values \[ \alpha = 0.98,\quad I_E = 2.8\,mA \]

Step 2: Apply formula \[ I_C = 0.98 \times 2.8 \]

Step 3: Multiply \[ = 2.744\,mA \]

Step 4: Approximate \[ \approx 2.74\,mA \]

Step 5: Final Answer \[ \boxed{2.74\,mA} \]