a) 90° out of phase from the input b) 180° out of phase from the input c) 45° out of phase from the input d) - 90° out of phase from the input Ans: (b)
a) true b) false Ans: (b)
a) Increase if the temperature increases b) Decrease if the temperature decreases c) Not change with the temperature variation d) None of the above Ans: (a)
a) the diode b) the transistor c) tetrode d) pentode Ans: (b)
a) N-p-n transistor b) P-n-p transistor c) N-type semiconductor d) P-type semiconductor Ans: (a)
a) To increase the current capacity of the transistor b) The biased circuit will saturate at the high current c) To avoid the use of separate power source for the input and output circuit of the transistor-amplifier d) None of the above Ans: (c)
a) (change in collector current)/(change in collector leakage current) b) (change in emitter current)/(change in collector leakage current) c) (change in emitter current)/(change in collector current) d) (change in collector leakage current)/(change in collector current) e) (change in collector current)/(change in emitter current) Ans: (a)
a) Common collector amplifier b) Common emitter amplifier c) Common base amplifier d) None of the above Ans: (a)
a) The bias resistance R connected to the cathode of the triode b) Between the plate and cathode c) Between the grid and plate d) Between the grid and cathode Ans: (a)
a) Is in phase with the input voltage b) Is 180° out of phase from the input voltage c) Is 90° out of phase from the input voltage d) Is 45° out of phase from the input voltage Ans: (a)
a) will increase b) will decrease c) will not change d) will be zero Ans: (a)
a) unity b) less than unity c) more than unity d) any one of the above Ans: (c)
a) In very high frequency circuits b) In low frequency circuits c) In medium frequency circuits d) In low current circuits Ans: (a)
a) Low input resistance compared to FET b) High input resistance compared to FET c) Zero input resistance d) Infinity resistance Ans: (a)
a) holes carrier only b) electrons carrier only c) either (a) or (b) d) (a) and (b) both Ans: (c)