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

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 base of a transistor is ………….. doped

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

Beta’s current ratio is ……..

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

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

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

ICEO = (………) ICBO

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

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

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

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

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

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

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

IC = αIE + ………….

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

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

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

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

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

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

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

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

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

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

Voltage-divider bias provides ……….

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

. IC = β IB + ………..

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

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?

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 …………….

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

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 …………

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 in a common base arrangement is …………….

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

A transistor is a …………… operated device

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

. In a transistor ………………..

The most commonly used semiconductor in the manufacture of 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.

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

. The current IB is …………

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

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

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

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

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

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

A transistor has …………………

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

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

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