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

Voltage-divider bias provides ……….

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

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

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

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

Beta’s current ratio 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 ……….

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

. The current IB is …………

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

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

IC = αIE + ………….

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

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

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 …………..

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

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

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

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

. In a transistor ………………..

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

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

A transistor is a …………… operated device

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

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

ICEO = (………) ICBO

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

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

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

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

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

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

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

A transistor has …………………

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

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

. IC = β IB + ………..

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

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

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

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

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

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

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 …………….

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

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 = [α / (1 – α )] IB + ………….

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

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

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

The most commonly used semiconductor in the manufacture 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 ………….

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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