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

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

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

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

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

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

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

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

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

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

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

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

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

. IC = β IB + ………..

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

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

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

. In a transistor ………………..

A transistor is a …………… operated device

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

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

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

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

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

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

IC = [α / (1 – α )] IB + ………….

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

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

. The current IB is …………

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

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

ICEO = (………) ICBO

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

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

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

Beta’s current ratio is ……..

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

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

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

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

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

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

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

A transistor has …………………

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

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

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

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

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

Total emitter current is …………

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

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 …………….

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

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

IC = αIE + ………….

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?

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

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

Voltage-divider bias provides ……….

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

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

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

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

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

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

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

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

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

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

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

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