16 2-46.   Which of the following is a transistor configuration that provides a phase reversal? 1.  Common bias 2.  Common input 3.  Common emitter 4.  Common collector 2-47.   What is the symbol for input current in a common-emitter configuration? 1.  I_E 2.  I_B 3.  I_C 4.  I_T 2-48.   What is the symbol for input current in a common-base configuration? 1.  I_E 2.  I_B 3.  I_C 4.  I_T 2-49.   What term is used to indicate current gain in a common-emitter configuration? 1.  Alpha 2.  Beta 3.  Gamma 4.  X-ray 2-50.   What term is used to indicate current gain in a common-collector configuration? 1.  Alpha 2.  Beta 3.  Gamma 4.  X-ray 2-51.   What term is used to indicate current gain in a common-base configuration? 1.  Alpha 2.  Beta 3.  Gamma 4.  X-ray 2-52.   Which of the following formulas is used to figure current gain in a common- emitter configuration? 1. 3. 2. 4. 2-53.   Which of the following formulas is used to figure current gain in a common-base configuration? 1. 3. 2. 4. 2-54.   Which of the following formulas is used to figure current gain in a common- collector configuration? 1. 3. 2. 4. 2-55.   The common collector is also referred to by which of the following terms? 1.  Low current gain amplifier 2.  Voltage amplifier 3.  Emitter follower 4.  Grounded emitter