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

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

IC = αIE + ………….

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

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

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

Total emitter current is …………

Beta’s current ratio is ……..

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

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

A transistor is a …………… operated device

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

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

IC = [α / (1 – α )] IB + ………….

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

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

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

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

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

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

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

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 ………….

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

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

A transistor has …………………

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

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

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 …………..

Voltage-divider bias provides ……….

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

. IC = β IB + ………..

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

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

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

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

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 ………..

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

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

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

. In a transistor ………………..

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

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

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

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

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

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

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

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

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

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

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

ICEO = (………) ICBO

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

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

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

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

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

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

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

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

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

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

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

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

. The current IB is …………

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

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

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

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

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

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