68401. In a series regulated power supply circuit, the voltage gain Av, of the 'pass' transistor satisfies the condition
68402. Assertion (A): In CC amplifier the collector is at ac ground Reason (R): CC amplifier is also called emitter follower
68403. The circuit consisting of two transistor connected in series with the d.c. supply voltage is called
68404. Common emitter transistor has
68405. A three terminal monolithic IC regulator can be used as
68406. Which of the following is not the main characteristic of a FET?
68407. The basic amplifier in Weinbridge oscillator consists of
68408. To obtain very high I/P and O/P impedances in a feedback amplifier, the topology used is
68409. Efficiency of a half wave diode rectifier is less than 40%.
68410. Generally op amp is used in
68411. The equivalent circuit of an op-amp has
68412. In a transistor with normal bias
68413. A transistor has collectoremitterbase In a N-P-N transistor the electron flow into the transistor at
68414. Negative feedback in amplifier
68415. Which of the following is the fastest switching device?
68416. Which of the following is not valid in case of bipolars?
68417. The input resistance of JFET ideally approaches
68418. In the analysis of common emitter amplifier we may neglect
68419. The ac input voltage of an amplifier
68420. Assertion (A): Negative feedback reduces the gain of an amplifierReason (R): Negative feedback is very commonly used in amplifier circuits
68421. In figure the coordinates of Q point on the load line are (Neglect VBE)
68422. The emitter resistor RE in the emitter of CE amplifier stabilizes the dc operating point against variation in
68423. Which of the following circuit does not need a coupling capacitor?
68424. 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.
68425. In case of a transistor amplifier the emitter resistance Re is removed
68426. In oscillators class C operation is preferred because
68427. In a common emitter circuit all voltages are measured with respect to
68428. A ripple in collector supply voltage of the output stage of amplifier causes noise.
68429. In a transistor IE = 10 mA, ICO = 0.5 μA and a = 0.995. Then ICEO =
68430. As a compared to a CB amplifier, a CE amplifier has
68431. The stray capacitance between the last stage and the first stage of an oscillator may cause
68432. In a voltage regulator circuit using zener diode the load voltage is nearly constant only if
68433. Zionism is a world movement of:
68434. Figure shows basic Hartley oscillator configuration. Do you think the polarities marked for the split coiled are correct?
68435. If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will
68436. A boot strap generally incorporates
68437. The common-drain amplifier, better known as the source follower, has a voltage gain __________ and the output signal is __________ with the input signal.
68438. In CB amplifier the distortion of the input voltage waveform may occur due to
68439. As compared to full wave rectifier, a half wave rectifier
68440. Assertion (A): A self bias circuit is the most commonly used bias circuit for bipolar junction transistorsReason (R): A self bias circuit limits the increase in collector or emitter current due to change in junction temperature.
68441. 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
68442. A sine wave with slew rate distortion looks like
68443. In the case of the circuit shown in the figure, the collector current IC will be, if β = 100, VBE = 0.7 V, ICO = 0.1 βA at 20°C
68444. A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. The frequency of oscillations is
68445. Jallianwala Bagh is situated in:
68446. Assertion (A): Electric coupling, magnetic coupling and ground loop can cause unwanted high frequency oscillations.Reason (R): Hartley oscillator uses a tapped inductor
68447. In figure VCE (sat) = 0.1 V. Then IC (sat) =
68448. Assertion (A): The ac load line is different from dc load lineReason (R): The ac load resistance seen by collector and emitter is different from dc load resistance
68449. In a class C operation VCC = 40 V and VCE(sat) = 0.4 V. The efficiency is
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use
Powered By:Omega Web Solutions