a) The electrons drifting through the depletion region pick up sufficient K.E. to ionize other atoms with which they collide and produce sudden large reverse current b) There is large forward bias current to cause breakdown c) There is large reverse bias current to break covalent bonds and produce free electron-hole pairs d) None of the above Ans: (c)
a) Zener breakdown only b) Avalanche breakdown only c) Either (a) or (b) d) (a) or (b) both Ans: (d)
a) D.C. voltage b) A.C. voltage c) Square wave d) Sinusoidal voltage Ans: (a)
a) Without converting it to alternation current b) First converting to alternating current and amplify it, then reconverts to direct current c) Either (a) or (b) d) None of the above Ans: (b)
a) RC coupled amplifier b) Transformer coupled amplifier c) Direct-coupled amplifier d) Difference amplifier Ans: (c)
Which of the following amplifiers will be used?
a) RC coupled amplifier b) Transformer coupled c) Difference amplifier d) Audio power amplifier Ans: (c)
a) True b) False Ans: (a)
a) Stereophonic b) Microphonic c) Electro-chemical conversion d) Vibrational echo Ans: (b)
a) 0° C b) Absolute zero c) 0 °F d) 273° K Ans: (b)
a) True b) False Ans: (a)
a) Coupled capacity b) Cathode bypass capacity c) Output capacitance of the signal source d) Inter-electrode capacitance and stray capacitance Ans: (d)
a) Increase b) Decrease c) Not be affected d) Become random in the nature Ans: (b)
a) Positive b) Negative c) Zero d) Unity Ans: (b)
a) Zero b) One c) Infinity d) Less than zero Ans: (b)
a) The ratio range of frequency only b) The audio range of frequency only c) (a) and (b) both d) Video range of frequency only Ans: (c)