a) Increase its output impedance b) Decrease its output impedance c) Stabilize the frequency of the oscillators d) Stabilize the output amplitude Ans: (d)
a) True b) False Ans: (a)
a) Increased input impedance b) Reduced output impedance c) Improved gain stability d) Extended bandwidth Ans: ()
a) Power amplification b) Current amplification c) Voltage amplification d) Gain amplification Ans: (c)
a) Power feedback b) Voltage feedback c) Current feedback d) Signal feedback Ans: (c)
a) The element has negative temperature b) The current/voltage curve has negative slope c) The element has negative specific resistance d) The current/voltage curve has positive slop Ans: (b)
a) Aβ = 0 b) Aβ ≤ 1 c) Aβ ≥ 1 d) A β= 1 Ans: (c)
a) True b) False Ans: (a)
a) fo+4 = 1/2π √RC b) f0+4 = 1/2π √3RC c) f0+4 = 1/2π √6RC d) f0+4 = 1/√RC Ans: (c)
a) The grid circuit only b) The plate circuit only c) (a) or (b) d) None of the above Ans: (c)
a) Grid becomes more negative b) Reid because more positive c) Grid is neutralized as it is surrounded by positive ions d) Grid is disconnected from the circuit Ans: (c)
a) True b) False Ans: (a)
a) The junction resistance increases and emitter voltage decreases b) The junction resistance decreases and the emitter voltage decreases c) The junction resistance decreases and emitter voltage increases d) The junction resistance decreases and emitter voltage increases Ans: (b)
a) True b) False Ans: (a)
a) To reduce the vibrational noise b) To reduce the noise component from pick-up and leakage c) To avoid the electrical shocks d) To avoid the need of earth wire Ans: (b)