126. In a CE amplifier the collector resistance is short circuited. The ac output voltage will
127. In a transistor CE mode, VCC = +30 V. If the transistor is in cut off region, VCE =
128. The dc load current in a bridge rectifier circuit is 10 mA. The dc load current through each diode is
129. An integrating amplifier has resistance in feedback path.
130. The units of transistor h parameters h11 and h22 are the same.
131. Positive feedback is mainly used in
132. For a BJT if β = 50, ICEO = 3 μA and IC = 1.2 mA then IB
133. In figure, ID = 4 mA. Then VD =
134. The main application of enhancement mode MOSFET is in
135. A circuit using an op-amp is shown in the given figure. It has
136. Assertion (A): In CE amplifier the emitter is at ground potential for ac signalsReason (R): A CE amplifier has near unity voltage gain
137. An oscillator requires an amplifier
138. A full wave bridge diode rectifier uses diodes having forward resistance of 50 ohms each. The load resistance is also 50 ohms. The voltage regulations is
139. The disadvantage of direct coupled amplifiers is
140. A transistor has a power rating of 8 W for a case temperature of 25°C. If derating factor is 30 mW/°C, the power rating for 55°C, case temperature is
141. In figure VBE = 0.7 V. The base current is
142. An ideal power supply has
143. In a self bias circuit for CE amplifier, the emitter resistance is made three times the original value. The collector current will
144. A P-channel MOSFET operating in the enhancement mode is characterized by Vt = - 4 V and IDQ = - 10 mA, when VGSQ = - 5.5 V, what will be VGSQ if IDQ = -15 mA and ID, on = - 16 mA
145. If the Q of a single stage single tuned amplifier is doubled, the bandwidth will
146. In full wave rectification, if the input frequency is 50 Hz, then frequency at the output of filter is
147. The circuit in the given figure is
148. The turn ratio of a transformer is 20:1, if a load of 10Ω is connected across the secondary, what will be the effective resistance seen looking into the Primary?
149. In a CE amplifier circuit the ac voltage between emitter and ground
150. A 120 V, 30 Hz source feeds a half wave rectifier circuit through a 4 : 1 step down transformer, the average output voltage is