FET and FET Amplifiers Objective Questions and Answers

127. As compared to a full wave rectifier using two diodes, the four diode bridge rectifier has the dominant advantage of

128. A 24 V, 600 mW, Zener diode is to be used in for providing a 24V stabilized supply to a variable load. Assuming for a proper Zener action, a minimum of 10mA must flow through the zener. If the input voltage is 32V, what would be the value of R and maximum load current?

A. 3200, 10 inA

129. The threshold voltage of an n-channel MOSFET can be increased by

A. increasing the channel doping concentration

B. reducing the channel length

C. reducing gate oxide thickness

D. decreasing the channel doping concentration

Discussion

130. The MOSFET switch in its on-state may be considered equivalent to

131. A properly biased JFET will act as a

A. current controlled current source

B. voltage controlled voltage source

C. voltage controlled current source

D. current controlled voltage source of a of the transistor

Discussion

132. If a = 0.98, 'Co = 6 ittA and 10 = 100 IAA for a transistor, then the value of lc will be

133. An n-channel JFET having a pinch-off voltage (Vi) of ?5V shows a transconductance (gm) of 1 mA/V, when the applied gate-source voltage (VGs) is ?3V. Its maximum transconductance (inmA/V) will be

Electronics Engineering Objective Questions { FET and FET Amplifiers }