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

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

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

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

Voltage-divider bias provides ……….

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

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

IC = αIE + ………….

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

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

. IC = β IB + ………..

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

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

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

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

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

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?

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 …………..

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

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

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

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

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

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

. The current IB is …………

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

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

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

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

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

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

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

Beta’s current ratio is ……..

A transistor is a …………… operated device

. In a transistor ………………..

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

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

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

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

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

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

Total emitter current is …………

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

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 ………………

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

A transistor has …………………

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

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

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

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

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

The element that has the biggest size in a transistor 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 most commonly used transistor arrangement is …………… arrangement

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

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

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

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

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

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

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

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

IC = [α / (1 – α )] IB + ………….

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 …………

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

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

The number of depletion layers in a transistor 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 ……

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

ICEO = (………) ICBO

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