Explore topic-wise MCQs in Engineering.

For a common-emitter amplifier, the purpose of swamping is

What is the typical value of the current gain of a common-base configuration?

An emitter-follower is also known as a

For the common-emitter amplifier ac equivalent circuit, all capacitors are

When the bypass capacitor is removed from a common-emitter amplifier, the voltage gain

Refer to this figure. Determine the value of V_C.

The ________ configuration is frequently used for impedance matching.

The current gain for the Darlington connection is ________.

Which of the following configurations has the lowest output impedance?

Refer to this figure. Find the value of I_E.

For the BJT to operate in the saturation region, the base-emitter junction must be ________-biased and the base-collector junction must be ________-biased.

Calculate I_Csat.

Calculate the storage time in a transistor switching network if t_off is 56 ns, t_f = 14 ns, and t_r = 20 ns.

Calculate the voltage across the 91 k resistor.

Calculate the value of V_CEQ.

For what value of does the transistor enter the saturation region?

Which of the following is (are) the application(s) of a transistor?

The total time required for the transistor to switch from the "off" to the "on" state is designated as t_on and defined as the delay time plus the time element.

Determine the current through each diode if E₁ = E₂ = 0 V.

Refer to the figure given below. If the voltmeter across the transformer reads 0 V, the probable trouble, if any, would be

The output frequency of a half-wave rectifier is ________ the input frequency.

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 for Si and V_D 0.3 V for Ge.

What best describes the circuit?

Determine the voltage across the resistor.

Rectifiers are commonly used in battery chargers.

List the categories of clippers.

A silicon diode has a voltage to ground of 117 V from the anode. The voltage to ground from the cathode is 117.7 V. The diode is

What is the logic function of this circuit?

Determine I_D.

In a voltage-multiplier circuit, the number of diodes is directly proportional to the multiplicative voltage factor.

In the operation of a half-wave rectifier with a capacitor-input filter, the ripple factor can be lowered by ________ the value of the filter capacitor or ________ the load resistors.

Determine I_D2.

A short circuit has a ________ drop across its terminals, and the current is limited only by the surrounding network.

Determine the peak for both half cycles of the output waveform.

An open circuit can have any voltage across its terminals, but the current is always ________.

Determine I_D1.

Determine I_D2.

Determine the current level if E = 15 V and R = 3 k.

Determine V₂.

If the ac supply is 50 Hz, what will be the ripple frequency out of the full-wave rectifier?

In a regulated supply, what term describes how much change occurs in the output voltage over a certain range of load current values, from minimum to maximum current?

Determine the average value of the current through the load resistor.

What best describes the circuit?

Refer to this figure. If an emitter bypass capacitor was installed, what would the new A_v be?

A Darlington pair provides beta ________ for ________ input resistance.

Which of the following configurations has a voltage gain of R_C /r_e?

A Darlington pair amplifier has

Which of the following techniques can be used in the sinusoidal ac analysis of transistor networks?

The input impedance of a BJT amplifier is purely ________ in nature and can vary from a few ________ to ________.

The ________ the source resistance and/or ________ the load resistance, the less the overall gain of an amplifier.