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

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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

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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

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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

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145. In logarithmic amplifiers, output voltage is equal to
A. log10 (input voltage)
B. loge (input voltage)
C. input voltage
D. input voltage

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146. Logarithmic amplifiers are used in
A. adders
B. dividers
C. multipliers
D. all of the above

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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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