p2- developments in technology

Question 1

19th century

Answer 1

electrical batteries and circuits

• examples: basic lightings, motors, switches

Question 2

early 20th century

Answer 2

vacuum tube

-examples: early amplifiers, radios, TVs and computers

Question 3

1940s

Answer 3

Transistor

examples: portable radios,

Question 4

1960s

Answer 4

microelectronic

examples: powerful computers, highly portable devices eg music players

Question 5

1980s

Answer 5

ultra large-scale ICs

examples: laptops, mobile phones

Question 6

2017

Answer 6

10,000,000 + transistor ICs

examples: supercomputers, powerful mobile devices

Question 7

compact cassette

Answer 7

impact:
portability, enclosed magnetic recording tape

Question 8

CD

Answer 8

-reliable, wear-free storage of digital files

Question 9

laser

Answer 9

reliable, non-contact, light transmission of CD data

Question 10

LCD display

Answer 10

facilitates user display interface

Question 11

Ni-Mh batteries

Answer 11

rechargeable, portable power

Question 12

MP3

Answer 12

-increased capacity of devices to store more songs

Question 13

miniature hard drives

Answer 13

• high capacity storage capability

Question 14

lithium batteries

Answer 14

rechargeable power and long battery life

Question 15

microelectronics

Answer 15

miniature electronic devices and systems facilitated by the development of the integrated circuit

Question 16

flash storage

Answer 16

no moving parts, improve reliability