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

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

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

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

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

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

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

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

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

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

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 ………….

ICEO = (………) ICBO

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

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

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

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

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

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

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

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

A transistor is a …………… operated device

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

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

Voltage-divider bias provides ……….

The input impedance of 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 collector-base junction in a transistor has ……………..

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

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

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

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

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

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

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

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

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

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

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

Total emitter current is …………

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

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

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

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

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

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

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

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

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

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

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

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

. In a transistor ………………..

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

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

A transistor has …………………

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

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?

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

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

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

IC = αIE + ………….

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

Beta’s current ratio is ……..

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

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

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

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

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

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

. The current IB is …………

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

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

. IC = β IB + ………..

IC = [α / (1 – α )] IB + ………….