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

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

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

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

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

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

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

. In a transistor ………………..

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

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

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

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

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

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

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

IC = αIE + ………….

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

. The current IB is …………

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 …………….

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

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

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

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

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

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

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

Total emitter current is …………

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

Beta’s current ratio is ……..

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

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

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

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

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

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

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

A transistor has …………………

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

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

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

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

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

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

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

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 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 ………………

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

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

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

IC = [α / (1 – α )] IB + ………….

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

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

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

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

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

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

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

ICEO = (………) ICBO

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

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

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

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

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

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

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 ……….

A transistor is a …………… operated device

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

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

. IC = β IB + ………..

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

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

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

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