141. A crystal diode is a ____ device
A. non-linear
B. bilateral
C. linear
D. none of the above

---

142. A crystal diode utilises characteristic for rectification.
A. reverse
B. forward
C. forward or reverse
D. none of the above

---

143. When a crystal diode is usedas a rectifier, the most important consideration is
A. forward characteristic
B. doping level
C. reverse eharacteristic
D. PIV rating

---

144. If the doping level in a crystal diode is increased, the width of depletion layer
A. remains the same
B. is decreased
C. is increased
D. none of the above

---

145. A zener diode has
A. one pn junction
B. two pn junctions
C. three pn junctions
D. none of the above

---

146. A zener diode is used as
A. an amplifier
B. a voltage regulator
C. a rectifier
D. a multivibrator

---

147. The doping level in a zener diode is that of a crystal diode.
A. the same as
B. less than
C. more than
D. none of the above

---