Basic Electronic
What are the two basic types of transistors?
NPN and PNP
An atom with five or more valence electrons is?
an insulator
The hexadecimal number C is equivalant to the decimal number
12
The maximum BCD value is
1000
A two-input digital circuit outputs a logic-0 only when both of its inputs are logic-1 is an
NAND gate
What are the two materials normally used to construct transistors?
P and N materials
An electron has a?
negative charge
The binary bit number 0010 is equivalent to the decimal number
2
Characters that modify a device's behavior rather than representing text are known as
control codes
A flip-flop stores a single logical value known as a
bit
The term thyristor includes which groups of components
Diacs, triacs, and SCRs
What is a characteristic of a diac?
It will conduct on either half of the AC waveform
A register is made of
D flip-flops
In order for digital devices to communicate with each other reliably, they must recognize the same
logic levels
Clocked flip-flops that respond based on whether the clock signal is logic-0 or logic-1 are
level-triggered
What bias has been applied to a PN junction if the cathode is positive with respect to the anode?
Reverse bias
A common purpose of a rectifier (PN junction) is to?
convert AC into DC
A useful binary addition circuit is made from many individual
simple adders
A two-input digital circuit outputs a logic-1 only when both of its inputs are logic-1 is an
AND Gate
Combination logic circuits experience a time period between the moment when their inputs change and the moment when their outputs react. This is called an
Propagation delay
In an atom, the orbiting electrons are heald in place by
an electric force
The circuit in a binary adder that performs the summation is made from a pair of
XOR gates
What is the value (weight) of the fourth column of a binary number?
8
A NOT gate is often called an
inverter
The basic building block of digital technology is the
gate