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

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

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

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

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

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

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

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

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

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

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

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

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

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

A transistor is a …………… operated device

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

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

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

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

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

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

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

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

IC = [α / (1 – α )] IB + ………….

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

Total emitter current is …………

Voltage-divider bias provides ……….

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

. IC = β IB + ………..

. The current IB 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 ……….

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

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?

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

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

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

A transistor has …………………

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

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

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

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

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.

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

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

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

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

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

IC = αIE + ………….

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Beta’s current ratio is ……..

. In a transistor ………………..

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

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

ICEO = (………) ICBO

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

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

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

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