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

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

A transistor is a …………… operated device

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

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

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

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

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

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

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

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

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

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

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

. In a transistor ………………..

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

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

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

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

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

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 ………….

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

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

. IC = β IB + ………..

Voltage-divider bias provides ……….

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

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

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

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 ………….

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

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

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

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

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

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

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

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

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

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

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

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 ……….

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

Beta’s current ratio is ……..

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

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

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

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

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

A transistor has …………………

IC = [α / (1 – α )] IB + ………….

The output impedance of a transistor 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?

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

Total emitter current is …………

IC = αIE + ………….

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

ICEO = (………) ICBO

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

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

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

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

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

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

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

. The current IB is …………

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

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

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

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

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 …………….

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

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 ………………