Basic Electronics (DNF)

Question 1

what are some examples of electronic devices?

Answer 1

The CPU, memory, bus

Question 2

what is the work of the electronic devices?

Answer 2

by carefully controlling the flow of electrons through the device

Question 3

**voltage

Answer 3

the measure of the difference in electrical energy (between two points in an electrical field)

Question 4

what is valtage measured in?

Answer 4

volts

Question 5

**current

Answer 5

the movement of electrons through a wire

Question 6

what is electric current measured in?

Answer 6

amperes (amp) - number of charges that move through the wire per second

Question 7

**Transistors

Answer 7

they are tiny electronis switches. They switch on or off depending on the resistance it had detected (low res. ON, high res. OFF)

ie. think of it, simply, as a messenger boy/switch

Question 8

what is the point of these transistors?

Answer 8

to recieve signals from low current devices and use these to turn on high current devices

Question 9

**Resistors

Answer 9

limits or regulates the flow of electrical current in an electronic circuit

Question 10

what is the point of a resistor?

Answer 10

used to provide a specific voltage for an active device such as a transistor

Question 11

what is the most common type of resistors?

Answer 11

carbon-composition resistors

Question 12

what does LED stand for?

Answer 12

Light emitting diode

Question 13

what does an LED do?

Answer 13

produces light

Question 14

what is the purpose of an LED light?

Answer 14

used for indicator lights in electrical equipment

ie. to show that a certain part of a circuit is functioning

Question 15

what is a capacitor

Answer 15

they store an electrical charge

Question 16

what is the purpose of a capacitor

Answer 16

to store large amounts of energy in preparation so that when the computer suddenly runs out of energy, this can give back the energy lost eg. a camera flash photograph

ie. used to filter out fluctuations in a signal