101. A differential amplifier consists of two CB amplifiers.
102. Figure shows a portion of linear v - i characteristics of diode. If applied voltage is + 6 V, the current will be
103. A power transistor dissipates 5 W. If ambient temperature is 30° and case to air thermal resistance is 10° C/W, the case temperature is
104. An R-C coupled amplifier has mid-frequency gain of 200 and a frequency response from 100 Hz to 20 kHz. A negative feedback network with β = 0.2 is incorporated into the amplifier circuit, the Bandwidth will be
105. In figure the zener current
106. In a commercially available good power supply the voltage regulation is about
107. In the circuit of figure the diode
108. The most commonly used bias in BJT amplifier circuits is
109. In the circuit of figure, v1 = v2 = 10 V. Then
110. The inverting op-amp shown in the figure has an open loop gain to 100. The closed loop given is
111. In a voltage regulated power supply the zener operates in the breakdown region when (Vin is input voltage and Vz is zener breakdown voltage)
112. The parameter h11 for CB circuit is higher than that for CE circuit.
113. Figure shows a self bias circuit for FET amplifier, ID = 4 mA. Then IS =
114. In the CE equivalent circuit of figure, the voltage gain is
115. In a CE amplifier
116. The voltage gain of an amplifier without and with feedback are 100 and 20. The negative feedback is
117. In the circuit shown in figure, RC = 10k, RE = 150Ω, β = 100, I = 1 mA. The value of , will be
118. Calculate the conductivity of pure silicon at room temperature when the concentration of carriers is 1.6 x 1010 per cm3. Take μe = 1500 cm2/V-sec, μh = 500 cm2/V-sec at room temperature,
119. A potential of 7 V is applied to a silicon diode. A resistance of 1 kΩ is also connected in series. If the diode is forward biased, the current in the circuit is
120. Which of the following?
121. In a transistor E mode the collector current with the transistor in cut off region is
122. Two CE stages, 1 and 2 are coupled through a capacitor. VCC is the same for both. Base resistances RB1 and RB2 are such that RB1 > RB2. Then
123. In a two stage CE amplifier circuit, the ac collector resistance of the first stage depends on
124. In a CE amplifier the ac cut off voltage is 9 V and slope of ac load line is - 0.5 mA/V. The ac saturation current is
125. For dc the current through coupling capacitor in CE amplifier circuit is