141. Tuned class C amplifiers are used for RF signals of
A. low power
B. high power
C. very low power
D. none of the above
142. For frequencies below the resonant frequency, a parallel LC circuit behaves as a ___ load.
A. inductive
B. resistive
C. capacitive
D. none of the above
143. An ideal voltage amplifier should have
A.R =0,R0= 0
B. R. = 0, R0 =0
C. R = R0 = 0
D.R=oo,R0oo =0
144. An ideal current amplifier should have
A.R =0,Ro= 0
B. R =0, R0 =0
C. R = oe,R0 =0
D. R = oo,R0=00
145. In logarithmic amplifiers, output voltage is equal to
A. log10 (input voltage)
B. loge (input voltage)
C. input voltage
D. input voltage
146. Logarithmic amplifiers are used in
A. adders
B. dividers
C. multipliers
D. all of the above
147. Which amplifier will be preferred for highest gain?
A. Darlington's pair
B. Cascade amplifier
C. Cascode amplifier
D. Depends on the circuitry
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