Page 65 - FUNDAMENTALS OF COMPUTER

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NPP Computer Basics and Windows Fundamentals 65

Fig. 1.15: LCD Monitor
Disadvantages of LCD Monitor LCD _m°{ZQ>a H$s hm{Z`m§
1. Higher cost. 1. BZH$s cmJV A{YH$ hmoVr h¡Ÿ&
2. Lower contrast ratio. 2. BZH$m H§$Q´>mñQ> AZwnmV AÀN>m Zht hmoVmŸ&
3. Limited viewing angle. 3. BZH$m XoIZo H$m H$moU gr{_V hmoVm h¡Ÿ&
4. Brightness distortion towards edges. 4. H$moZm| na Vrd«Vm Ho$ H$maU {dH¥${V hmoVr h¡Ÿ&
5. Slower response time. 5. H$m_ H$aZo H$s J{V H$_ hmoVr h¡Ÿ&

1.35 Hardware, Software and Firmware 1.35 hmS>©do`a, gm°âQ>do`a VWm \$_©do`a
A Computer System is a combination of EH$ g§nyU© H$åß`yQ>a H$B© Vah Ho$ hmS>©do`a, gm°âQ>do`a
various hardware, software and firmware. VWm \$_©do`a H$m g§`moOZ hmoVm h¡ Ÿ& BÝh| `hm± na g_Pm`m
These terms are described here:
J`m h¡…
Hardware hmS>©do`a

The physical parts of computer are called H$åß`yQ>a Ho$ ^m¡{VH$ {hñgm| H$mo hmS>©do`a H$hVo h¢ Ÿ&
Hardware. A hardware occupy certain volume. AWm©V² Omo {hñgo ñWmZ KoaVo h¢, hmS>©do`a H$hbmVo h¢ Ÿ&
These include electronic, electrical, magnetic,
mechanical and optical components in a com- BZ_| BboŠQ´>m°{ZH$, `m§{ÌH$, Mw§~H$s` VWm Am°pßQ>H$b Am{X
puter. Example, Hardware are keyboard, moni- {hñgo Am OmVo h¢ Ÿ& BZHo$ CXmhaU Bg àH$ma h¢ … H$s~moS>©,
tor, printer, CPU, scanner, mouse, Harddisk, _m°ZrQ>a, {à¨Q>a, CPU, ñH¡$Za, ‘mCg, hmS>©{S>ñH$, âbm°nr
floppy disk, modem, memory etc. Each of these {S>ñH$, ‘m°S>o‘, ‘o‘moar Am{X Ÿ& g^r Xmo AdñWmAm| Ho$
components work with two states only. For
example, the function of the keyboard is to AmYma na H$m`© H$aVo h¢ Ÿ& O¡go H$s~moS>© Cn`moJH$Vm© Ûmam
supply a binary number equivalent to the char- Xr JB© OmZH$mar H$mo 1 d 0 _| ~XbH$a H$åß`yQ>a H$mo XoVm
acter typed. The Hard disk stores the informa- h¡ & hmS>© {S>ñH$ Xmo ‘¡½Zo{Q>H$ ñnm°Q> ‘| BÝ’$m°‘}eZ H$mo ñQ>moa
tion in two magnetic spots; one may be H$aVr h¡ EH$ _| K‹S>r H$s {Xem VWm Xÿgar ‘| {dnarV {Xem
magnetised is clockwise direction and other _| Mw§~H$s` âcŠg hmoVo h¢ Ÿ&
may be magnetised in anticlockwise direction.