1. . The transconductance of FET depends upon
(A) Drain supply
(B) Gate to source voltage
(C) The type of FET
(D) Gate current
2. . A FET is a...........controlled device whereas a bipolar transistor is a............controlled device.
(A) Current, voltage
(B) Drain, gate
(C) Gate, drain
(D) Voltage, current
3. . In FET the drain voltage above which there is no increase in the drain current is called........ voltage
(A) Critical
(B) Pinch off
(C) Breakdown
(D) Pick off
4. . The gate input current of a FET is of the order of
(A) Amperes
(B) Hundreds of nanoamperes
(C) Milliamperes
(D) Microamperes
5. . Which of the following is the common features between FETs and bipolars?
(A) Difficult to bias
(B) Low input impedance
(C) Low voltage gain
(D) Current controlled devices
6. . The drain of FET is analogous to......... of BJT
(A) Emitter
(B) Collector
(C) Base
(D) Substrate
7. . In P-channel FET the current is due to
(A) Electrons
(B) Both holes and electrons
(C) Holes
(D) Either holes or electrons
8. . A FET can be used as a variable
(A) Inductor
(B) Capacitor
(C) Resistor
(D) Voltage source
9. . Which of the following is not the main characteristic of FET?
(A) None of the above
(B) Forward transconductance
(C) Temperature factor
(D) Amplification factor
10. . n-channel FETs are superior to p-channel FETs because
(A) They have high switching time
(B) Mobility of electrons is greater than that of holes
(C) They consume less power
(D) Mobility of electrons is smaller than that of holes
11. . The input resistance of JFET ideally approaches
(A) Zero
(B) 5 ohms
(C) Infinity
(D) 200 ohms
12. . The operation of a JFET involves a flow of
(A) Recombination carriers
(B) Any of the above
(C) Minority carriers
(D) Majority carriers