Explore topic-wise MCQs in Engineering.

The emitter resistor in an emitter-stabilized bias circuit appears to be ________ in the base circuit.

Ripple voltage is caused by the charging and discharging of the filter capacitor.

For greatest reliability, and longest life, diodes should be operated at their maximum ratings.

A diode conducts current when reverse-biased and blocks current when forward-biased.

The combination of a short circuit in series with an open circuit always results in a(n) ________ circuit.

The quiescent point (Q-point) is defined by a(n) ________.

A diode is in the ________ state if the current established by the applied sources is such that its direction matches that of the arrow in the diode symbol and V_D > 0.7 V.

When biased as a variable resistor, JFET resistance (R_DS) increases as V_GS becomes more negative.

The term bipolar reflects the fact that ________ and ________ participate in the injection process into the oppositely polarized material.

An atom is the smallest particle of an element that retains the characteristics of that element.

A pn structure is called a diode.

An intrinsic semiconductor is neither a good conductor nor a good insulator.

The ideal model of a diode is a switch.

The feedback network in a Colpitts oscillator contains two series capacitors and a parallel inductor.

The positive feedback voltage in an oscillator has no net phase shift.

Crystal oscillators are inherently unstable.

For a Wien-bridge oscillator, resonance occurs when V_out/V_in = 1.

LC feedback elements are normally used in oscillators for frequencies greater than 1 MHz.

An amplifier is stable if the absolute magnitude of A is ________.

Refer to the given figure. This circuit is known as

Refer to the given figure. A square-wave input is applied to this amplifier. The output voltage is most likely to be

In a full-wave rectifier, if no load were connected across the capacitor, the output voltage would ideally be a(n) ________.

The output of a loaded power supply is ________ that of the unloaded.

The filter output voltage of a power supply ________ when load current is drawn from the supply.

The specification sheet for the 7812 fixed positive voltage regulator shows that the output voltage could be as low as ________ or as high as ________.

A dc voltmeter reads the ________ while measuring a pulsating dc voltage.

The output resulting from a rectifier is a(n) ________.

In a foldback configuration, limiting the current reduces ________, protecting the load from overcurrent as well as protecting the regulator.

The ripple voltage V_r is a result of the ________.

Regulator IC units contain the circuitry for the ________.

A full-wave rectified signal has ________ dc component and ________ ripple than (as) the half-wave rectified voltage.

The output of an op-amp comparator will be zero when the input voltage exceeds the reference voltage.

A positive feedback network for hysteresis improves an op-amp comparator's noise immunity.

Load regulation is the percentage change in line voltage for a change in load voltage.

A comparator with hysteresis is sometimes known as a(n)

A three-terminal regulator can be used with an external pass transistor to increase the total load current available.

Since the crystal losses represented by R are small, the equivalent crystal Q (quality factor) is ________.

In the Colpitts oscillator, the frequency is determined by ________ .

Typically, a unijunction transistor has a stand-off ratio from ________ to ________.

The R/2R ladder is commonly used for D/A converters.

Bounding allows the output of a comparator to be an unlimited voltage.

The difference between the UTP and the LTP is the hysteresis voltage.

Crystal oscillators are used whenever a(n) ________ level of stability is required.

An amplifier with negative feedback has ________ bandwidth than (as) the amplifier without feedback.

________ is a mathematical process for determining the rate of change of a function.

An integrator circuit

In a comparator with output bounding, what type of diode is used in the feedback loop?

Which of the following are variations of the basic summing amplifier?

A differentiator is used to measure

A(n) ________ amplifier is a summing amplifier with a closed-loop gain equal to the reciprocal of the number of inputs.