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)

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)

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