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

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

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 collector of a transistor is …………. doped

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

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

. The current IB is …………

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

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

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

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

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

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

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

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?

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

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

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

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

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 …………….

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

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

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

Voltage-divider bias provides ……….

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

The power 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 ………………

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

Total emitter current is …………

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

ICEO = (………) ICBO

A transistor has …………………

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

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

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

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

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

. In a transistor ………………..

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

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 …………..

A transistor is a …………… operated device

IC = [α / (1 – α )] IB + ………….

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

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

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

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 …………

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

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

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

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 ………………..

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

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

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

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

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

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

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

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

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

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

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

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

Beta’s current ratio is ……..

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

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

IC = αIE + ………….

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

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

. IC = β IB + ………..

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

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

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

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