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

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

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

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

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

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 …………….

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

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

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

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

ICEO = (………) ICBO

Total emitter current is …………

. In a transistor ………………..

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

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

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

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

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

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

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

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

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

A transistor has …………………

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 …………..

. IC = β IB + ………..

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

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

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

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

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

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

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

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

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?

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

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

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

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

Beta’s current ratio is ……..

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

Voltage-divider bias provides ……….

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

IC = [α / (1 – α )] IB + ………….

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

A transistor is a …………… operated device

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

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

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

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

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

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

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

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

. The current IB is …………

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

IC = αIE + ………….