Electronics Basics II

1.

1 point

The logic gate that will have HIGH or “1” at its output when any one of its inputs is HIGH is a(n):

NAND

AND

NOR

OR

2.

1 point

The number of bits used to store a BCD digit is:

2

4

8

1

3.

1 point

3428 is the decimal value for which of the following binary coded decimal (BCD) groupings?

11010000101000

110100001101010

011010010000010

11010001001000

4.

1 point

The output will be a LOW for any case when one or more inputs are zero in a(n):

OR

AND

NAND

NOT

5.

1 point

Electrons in the outermost orbit or shell of an atom are called

conduction band electroncs

negative ions

Valence electrons

Free electrons

6.

1 point

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

16.80

0.20

1.05

0.95

7.

1 point

If a 169.7 V half-wave peak has an average voltage of 54 V, what is the average of two full-wave peaks?

119.9V

115.7V

339.4V

108.0V

8.

1 point

The basic logic gate whose output is the complement of the input is the:

AND

Comparator

INVERTER

OR

9.

1 point

The peak inverse voltage (PIV) across a nonconducting diode in a bridge rectifier equals approximately:

(Kindly study about secondary voltage)

peak value of the secondary voltage

twice the secondary voltage

half the peak secondary voltage

four times the peak value

10.

1 point

Base 10 refers to which number system?

Binary coded decimal

Octal

Hexadecimal

decimal

11.

1 point

Sample-and-hold circuits in ADCs are designed to:

sample and hold the output of the binary counter during the conversion process

sample and hold the ADC staircase waveform during the conversion process

stabilize the ADCs threshold voltage during the conversion process

stabilize the input analog signal during the conversion process

12.

1 point

When matching polarity connections have been made and the potential difference (PD) is above 0.7 V, the diode is considered to be:

reverse biased

not working

forward biased

open switch

13.

1 point

When transistors are used in digital circuits they usually operate in the:

Saturation and Cut off region

Breakdown region

Linear Region

Active region

14.

1 point

A pn junction allows current flow when

there is no potential on n-type or p-type

both n-type and p-type have same potential

n-type is more positive than p-type

p-type is more positive than n-type

15.

1 point

What is the decimal value of the hexadecimal number 777?

19111

191

1911

19

16.

1 point

If a signal passing through a gate is inhibited by sending a low into one of the inputs, and the output is HIGH, the gate is a(n):

NOR

OR

AND

NAND

17.

1 point

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

out of the base lead

into the collector

into the emitter

into the base supply

18.

1 point

Exclusive-OR (XOR) logic gates can be constructed from what other logic gates?

AND,OR and NOT gates

AND and NOT gates

OR and NOT gates

OR gates only

19.

1 point

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

maximum current gain

minimum current gain

cutoff point

intermediate current gain

20.

1 point

Which is beta’s current ratio?

IE/IB

IC/IB

IB/IE

IC/IE