MCQ on Transistors (Multiple Choice Questions and Answers On Transistors)

Total emitter current is …………

The input impedance of a transistor connected in …………….. arrangement is the highest

. When a silicon diode is forward biased, VBE for a CE configuration is ……..

. IC = [α / (1 – α )] IB + […….. / (1 – α )]

If VCC = +18 V, voltage-divider resistor R1 is 4.7 komega.gif, and R2 is 1500omega.gif, then the base bias voltage is ……….

If a transistor operates at the middle of the dc load line, a decrease in the current gain will move the Q point ………….

BC 147 transistor indicates that it is made of …………..

IC = αIE + ………….

A collector characteristic curve is a graph showing ………..

The value of β for a transistor is generally ………………..

The element that has the biggest size in a transistor is ………………..

In a pnp transistor, the current carriers are ………….

. IC = β IB + ………..

In a npn transistor, ……………. are the minority carriers

. In a transistor ………………..

Beta’s current ratio is ……..

The base of a transistor is ………….. doped

If a 2 mV signal produces a 2 V output, what is the voltage gain?

The relation between β and α is …………..

What is the current gain for a common-base configuration where IE = 4.2 mA and IC = 4.0 mA

In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of β is …………

The number of depletion layers in a transistor is …………

The input impedance of a transistor is ………….

A current ratio of IC/IE is usually less than one and is called …………

The output impedance of a transistor is ……………..

The power gain in a transistor connected in ……………. arrangement is the highest

A transistor is connected in CB mode. If it is not connected in CE mode with same bias voltages, the values of IE, IB and IC will …………..

The input/output relationship of the common-collector and common-base amplifiers is ………..

In a transistor, collector current is controlled by ………..

Voltage-divider bias provides ……….

A transistor has a mca12_1001a1.gif of 250 and a base current, IB, of 20 mu.gif A. The collector current, IC, equals to …………….

. A transistor may be used as a switching device or as a ………….

In a transistor if β = 100 and collector current is 10 mA, then IE is …………

The arrow in the symbol of a transistor indicates the direction of ………….

. The ends of a load line drawn on a family of curves determine ……

For a CC configuration to operate properly, the collector-base junction should be reverse biased, while forward bias should be applied to …………… junction.

Most of the majority carriers from the emitter ………………..

The collector-base junction in a transistor has ……………..

A transistor has …………………

As the temperature of a transistor goes up, the base-emitter resistance ……………

The collector of a transistor is …………. doped

With a PNP circuit, the most positive voltage is probably …………

To operate properly, a transistor’s base-emitter junction must be forward biased with reverse bias applied to which junction?

A heat sink is generally used with a transistor to …………

. Which is the higher gain provided by a CE configuration?

The Q point on a load line may be used to determine …………

If the value of α is 0.9, then value of β is ………..

The voltage gain in a transistor connected in ………………. arrangement is the highest

The emitter of a transistor is ………………… doped

The phase difference between the input and output voltages in a common base arrangement is …………….

With low-power transistor packages, the base terminal is usually the ……….

. The current IB is …………

ICEO = (………) ICBO

The value of α of a transistor is ……….

The leakage current in CE arrangement is ……………. that in CB arrangement

The voltage gain of a transistor connected in common collector arrangement is ………..

The output impedance of a transistor connected in ……………. arrangement is the highest

The C-B configuration is used to provide which type of gain?

IC = [α / (1 – α )] IB + ………….

In a transistor, signal is transferred from a …………… circuit

At the base-emitter junctions of a transistor, one finds ……………

In a transistor, the base current is about ………….. of emitter current

Most of the electrons in the base of an NPN transistor flow …………

A transistor is a …………… operated device

If an input signal ranges from 20–40 mu.gifA (microamps), with an output signal ranging from .5–1.5 mA (milliamps), what is the ac beta?

What is the collector current for a CE configuration with a beta of 100 and a base current of 30 mu.gifA?

The most commonly used semiconductor in the manufacture of a transistor is ………….

Three different Q points are shown on a dc load line. The upper Q point represents the ………….

The most commonly used transistor arrangement is …………… arrangement

The phase difference between the input and output voltages of a transistor connected in common collector arrangement is ………………

. When transistors are used in digital circuits they usually operate in the ………….

With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be ……

The phase difference between the input and output voltages of a transistor connected in common emitter arrangement is ………………

Often a common-collector will be the last stage before the load; the main function(s) of this stage is to ………….

In a CE configuration, an emitter resistor is used for ……