Page 67 - Electrician -1st Year - TT

Fig 4
úSo ªuú]ôhPm
CûQlT§XõÚkÕ (ON) ¨ßjÕm YûW (OFF)
JúW U§l©p CÚdÏm úSo ªuú]ôhPjûR
ùTôÕYôL DC LWuh G] AûZlTÕ
YZdLUôÏm.
AC Nlû[ (AC Supply) : AC Nlû[ûV AC
ù_]úWhPoLs (BpPoú]hPoLs) (Fig 4a)
êXm ùTß¡ú\ôm. ¥Wôuv@TôoUo (trans-
former) êXUôLl ùTßYÕm (Fig 4b) AC
ªu]ÝjRúU.
UôߧûN ªu]ÝjRm (Alternating voltage):
UôߧûN ªuú]ôhPUô]Õ, ùRôPokÕ
Ru §ûN Utßm A[ÜLû[Ùm Uôt±d
ùLôiúP CÚdÏm. Sm Åh¥tÏ TVuTÓm
TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.2.17 -19
ªu §\u, ªuNôW EtTj§ ¨ûXVj§XõÚkÕ
(power plants) YÚTûYÙm CûYúV. (Fig 5)
ûNàNônPp (sinusoidal) UôߧûN
ªu]ÝjRjûR, úSWj§túLt\ôtúTôp Uô±
Uô±YÚm Y¥YjûRd LôhÓ¡\Õ.
Fig 5
AC Nlû[, G@Td¥q U§l©u (effective value)
úYôphúPû_ ϱl©Ó¡\Õ Utßm JÚ
®]ô¥«p Uô± Uô±YÚm Ñt±u (cycle
Gi¦dûLûV A§oùYi (frequency)
G]lTÓm. @l¬dëu£ûV 'F' Gu\ GÝj§p
ϱl©PlTÓ¡\Õ Utßm AûX
A§oùYi²u (frequency) AXÏ ùaohv
(Hertz(Hz)) BÏm.
Ñ®hûN AC Nlû[«u Øû]Lû[ úTv/ ûXu (L)
Utßm ¨ëhWp (N) G]Üm ϱl©P úYiÓm.
JÚ ªuÑt±p LWuh ùNpYRtÏ
úYôphúPw LôWQUôÏm. JÚ ªuÑt±p
BpPoúSh¥e úYôphúPû_ ùLôÓjRp,
A§p ùNpÛm LWuhÓm BpPoúSh¥e
LWuh (ùTôÕYôL AC LWih) BÏm. (Fig 6)
DC «p ùTôXô¬h¥ ùPvh (Polarity test in
DC)
Øû]d ϱÂÓ (Polarity) : DC Nlû[ êXj§u
(source) CÚØû]LÞm, Tô£¥q ApXÕ
ùSL¥q Guß LiP±VlTP úYiÓm. Sôm
ªu ETLWQeLû[ GqYôß Nlû[ÙPu
CûQdLlTP úYiÓm GuTûR
Ñh¥dLôhP Es[ TRjûR (term)
47