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

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

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

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

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

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

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

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

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

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

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 ………….

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

IC = [α / (1 – α )] IB + ………….

ICEO = (………) ICBO

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

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

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 …………….

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

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

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

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

A transistor is a …………… operated device

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

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

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

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

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

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

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

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

. In a transistor ………………..

The output 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 …………..

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

A transistor has …………………

Beta’s current ratio is ……..

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

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

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

. The current IB is …………

Voltage-divider bias provides ……….

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

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

. IC = β IB + ………..

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

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

IC = αIE + ………….

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

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

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

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

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