Question: A MOSFET is sometimes called______________ JFET?

• 1. many gate
• 2. open gate
• 3. insulated gate
• 4. shorted gate

Question: A MOSFET uses the electric field of a _______________to control the channel current?

• 1. capacitor
• 2. battery
• 3. generator
• 4. none of the above

Question: If the gate of a JFET is made less negative, the width of the conducting channel__________________?

• 1. remains the same
• 2. is decreased
• 3. is increased
• 4. none of the above

Question: The gate voltage in a JFET at which drain current becomes zero is called ______________ voltage?

• 1. saturation
• 2. pinch-off
• 3. active
• 4. cut-off

Question: The pinch-off voltage of a JFET is about _______________?

• 1. 5 V
• 2. 0.6 V
• 3. 15 V
• 4. 25 V

Question: In class A operation, the input circuit of a JFET is ____________ biased?

• 1. forward
• 2. reverse
• 3. not
• 4. none of the above

Question: The pinch-off voltage in a JFET is analogous to _____________ voltage in a vacuum tube?

• 1. anode
• 2. cathode
• 3. grid cut off
• 4. none of the above

Question: _____________ has the lowest noise-level?

• 1. triode
• 2. ordinary trnsistor
• 3. tetrode
• 4. JFET

Question: Which of the following devices has the highest input impedance ?

• 1. JFET
• 2. MOSFET
• 3. Crystal diode
• 4. ordinary transistor

Question: The two important advantages of a JFET are _________________?

• 1. high input impedance and square-law property
• 2. inexpensive and high output impedance
• 3. low input impedance and high output impedance
• 4. none of the above