Q. Which of the following is the fastest switching device?

View solution

Q. Which of the following is not valid in case of bipolars?

View solution

Q. The input resistance of JFET ideally approaches

View solution

Q. In the analysis of common emitter amplifier we may neglect

View solution

Q. A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. The frequency of oscillations is

View solution

Q. Assertion (A): Electric coupling, magnetic coupling and ground loop can cause unwanted high frequency oscillations.

Reason (R): Hartley oscillator uses a tapped inductor

View solution

Q. In CB amplifier the distortion of the input voltage waveform may occur due to

View solution

Q. As compared to full wave rectifier, a half wave rectifier

View solution

Q. Assertion (A): A self bias circuit is the most commonly used bias circuit for bipolar junction transistors

Reason (R): A self bias circuit limits the increase in collector or emitter current due to change in junction temperature.

View solution

Q. In an amplifier if conductor during the cycle is from 0 to 90° and again from 180° to 270°, the amplifier will be termed as

View solution

Q. A sine wave with slew rate distortion looks like

View solution

Q. If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will

View solution

Q. A boot strap generally incorporates

View solution

Q. The common-drain amplifier, better known as the source follower, has a voltage gain __________ and the output signal is __________ with the input signal.

View solution

Q. Power transistors are invariably provided with

View solution

Q. Assertion (A): The ac load line is different from dc load line

Reason (R): The ac load resistance seen by collector and emitter is different from dc load resistance

View solution

Q. In a class C operation VCC = 40 V and VCE(sat) = 0.4 V. The efficiency is

View solution

Q. The absolute values of pinch-off voltage and gate-source cut-off voltage are

View solution

Q. Which of the following circuit does not need a coupling capacitor?

View solution

Q. Assertion (A): A large negative feedback is deliberately introduced in an amplifier to make its gain independent of variation is in parameters of active device and other components.

Reason (R): A large negative feedback results in a high value of return difference compared to unity which makes the feedback gain inversely proportional to feedback factor.

View solution