Four relations are given below. Identify the correct relation regarding a transistor?

• A. IE ÷ IC = IB
• B. IE > IC > IB
• C. IE < IC > IB
• D. IE > IC < IB

Answer: (B)

The emitter current (IE) of a transistor has two components such as base current (IB) and collector current (IC). The base current (IB) is about 2% of the emitter current (IE), but the collector current (Ia) is about 98% of the emitter current (IE).
∴ IE > IC > IB
IE = IB + IC