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

Question: In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ______________?

• 1. almost touch each other
• 2. have large gap
• 3. have moderate gap
• 4. none of the above

Question: A JFET has high input impedance because _________________?

• 1. it is made of semiconductor material
• 2. input is reverse biased
• 3. of impurity atoms
• 4. none of the above

Question: A JFET has ____________ power gain?

• 1. small
• 2. very high
• 3. very small
• 4. none of the above

Question: If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ______________?

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

Question: A JFET is a__________ driven device?

• 1. current
• 2. voltage
• 3. both current and voltage
• 4. none of the above