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

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

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

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

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

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

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

A transistor has …………………

A transistor is a …………… operated device

Voltage-divider bias provides ……….

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

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

. The current IB is …………

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

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

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

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

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

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

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

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

. In a transistor ………………..

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

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

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

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

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.

. IC = β IB + ………..

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

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

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

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

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

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 …………….

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

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

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

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

Beta’s current ratio is ……..

ICEO = (………) ICBO

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

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

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

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

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

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

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

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

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

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

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

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

IC = αIE + ………….

IC = [α / (1 – α )] IB + ………….

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

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

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

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

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

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

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

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

The input impedance of a transistor 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 ……….

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

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

Total emitter current is …………

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

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

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

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

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