1. The JFET is (a) a unipolar device (b) a voltage-controlled device (c) a current-controlled device (d) answers (a) and (c) (e) answers (a) and (b) 2. The channel of a JFET is between the (a) gate and drain (b) drain and source (c) gate and source (d) input and output 3. A JFET always operates with (a) the gate-to-source pn junction reverse-biased (b) the gate-to-source pn junction forward-biased (c) the drain connected to ground (d) the gate connected to the source 4. For VGS = 0 V, the drain current becomes constant when VDs exceeds (a) cutoff (b) VDD (c) Vp (d) 0 V 5. The constant-current region of a FET lies between (a) cutoff and saturation (b) cutoff and pinch-off (c) 0 and Ipss (d) pinch-off and breakdown 6. Ipss is (a) the drain current with the source shorted (b) the drain current at cutoff (c) the maximum possible drain current (d) the midpoint drain current 7. Drain current in the constant-current region increases when (a) the gate-to-source bias voltage decreases (b) the gate-to-source bias voltage increases (c) the drain-to-source voltage increases (d) the drain-to-source voltage decreases

Describe the consequences of each defect. 1) LED on switch C input is open 2) 7447A Input Opened 3) LAMP TEST shorted to ground 4) Resistance to pin 15(f) on 7447A is open

The VGS of a p -channel JFET is increased from 1 V to 3 V. (a) Does the depletion region narrow or widen? (b) Does the resistance of the channel increase or decrease?

If the time period of output voltage of a 1-o bridge rectifier is 25/3 ms, then the supply frequency is Hz

1. The JFET is (a) a unipolar device (b) a voltage-controlled device (c) a current-controlled device (d) answers (a) and (c) (e) answers (a) and (b) 2. The channel of a JFET is between the (a) gate and drain (b) drain and source (c) gate and source (d) input and output