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

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

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

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

Beta’s current ratio is ……..

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

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

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

A transistor is a …………… operated device

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

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

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

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?

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

ICEO = (………) ICBO

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

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

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 …………….

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

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

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

IC = [α / (1 – α )] IB + ………….

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

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

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

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

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

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

. In a transistor ………………..

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

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

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

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

. IC = β IB + ………..

Total emitter current is …………

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

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

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

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

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

The output 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 ………….

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

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

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

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 ………………

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

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

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

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

. The current IB is …………

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

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

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

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

A transistor has …………………

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

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

Voltage-divider bias provides ……….

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

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

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

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

IC = αIE + ………….

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

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

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

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

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

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

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

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