152. Regulation of the DC power supply of 12 V, 100 mA is the effective resistance of power supply is 20 Ω
153. “The Old Testament” tells of the ......... the Jews made with God.?
154. In the circuit of figure v1 = 8 V and v2 = 0. Which diode will conduct (Assume ideal diodes)?
155. Assertion (A): An op-amp has high voltage gain, high input impedance and low output impedanceReason (R): Negative feedback increases output impedance
156. A transistor has a maximum power dissipation of 350 mW at an ambient temperature of 25°C. If derating factor is 2 mW/°C, the maximum power dissipation for 40°C ambient temperature is
157. The output voltage waveform of a CE amplifier is fed to a dc coupled CRO. The trace on the screen will be
158. In an RC phase shift oscillator, the total phase shift of the three RC lead networks is
159. In the circuit of figure β = 100 and quiescent value of base current is 20 μA. The quiescent value of collector
current is
160. Values of VT at 20°C for an ideal P-N diode
161. Assertion (A): In an op-amp the voltage gain and band width can be adjusted as per requirementReason (R): Large value capacitor can also be fabricated on a chip
162. In figure which diode will conduct and what will be the value of V0?
163. For the amplifier circuit of figure, the h parameters of transistor are hib = 25 Ω, hfb = 0.999, hob = 10-6 Ω. The voltage gain is
164. In figure, VCC = + 30 V, R1 = 200 kΩ and R2 = 100 kΩ. If VBE = 0.7 V, the voltage a cross RE =
165. A negative feedback can be of
166. In a class C power amplifier the input frequency of ac signal is 1 MHz. If tank circuit has C = 1000 pF, the value of L =
167. The Vo of the op-amp circuit shown in the given is
168. In calculating output impedance of an amplifier the source is replaced by an open circuit.
169. For transistor 2 N 338 the manufacturer specifies Pmax = 100 mW at 250°C free air temperature and maximum junction temperature of 125°C. Its thermal resistance is
170. In figure base current is 10 μA and βdc = 100. Then VE =
171. It has been found that in a rectifier circuit with RC filter one RC section reduces ripple by 15%. Two RC sections are used in cascade the reduction in ripple would be
172. An op-amp has
173. In the figure, assume the op-amp is to be ideal. The output Vo if the circuit is
174. As the ratio Rf/RL increases the efficiency of a rectifier increases.
175. Assuming VCE sat = 0.2 V and β = 50, the minimum base current (IB) required to drive the transistor in the given figure to saturation is