162. The input gate current of FET is
A. a few amperes
B. a few milli-amperes
C. a few mico-amperes
D. negligibly small

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163. Which of the following transistor is affected by static electricity
A. npn transistor
B. JFET
C. UJT
D. MOSFET

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164. Which of the following device has the highest input impedance
A. CE BJT
B. CC BJT
C. JFET
D. MOSFET

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165. A field-effect transistor (FET)
A. has three pn junctions
B. uses a forward biased junction
C. depends on the variation of a magnetic field for its operation
D. depends on the variation of a reverse voltage its operation

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166. The operation of a JFET involves
A. flow of minority carriers alone
B. flow of majority carriers alone
C. flow of both minority and majority carriers
D. use of a magnetic field

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167. FET
A. has a very high input impedance
B. depends on minority carrier flow
C. uses a forward biased junction
D. uses a high concentration emitter junction [BHEL 20001

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168. The input impedance (Zi) and.the output impedance (Z0) of an ideal transconductance (voltage contikolled current source) amplifier are
A. Z, = 0, Z0 = 0
B. Zi = 0, Zo =
C. Z1 = co, Zo = 0
D. Z1= D., Zo =d

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