Page 98 - Electrician -1st Year - TT

TYo (Power) T«t£ 1.3.27 dLô] ùRôPo× LÚj§Vp
GXdh¬μVu (Electrician) þ A¥lTûP ªu²Vp T«t£ (Basic Electrical
Practice)

Km ®§ þ G°V ªu ÑtßLs Utßm ®]ôdLs (Ohm’s law - simple electrical
circuits and problems)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• Km-u ®§ûVl Tt± áßRp
• ªuÑtßL°p Km-u ®§ûV ©WúVô¡jRp Tt± ®[dÏL
• ªu §\u, ªu]ôt\p B¡VYtû\ YûWVßjRp Utßm
ùRôPo×ûPV LQdÏLÞdÏ ¾oÜ LôÔRp. Scan the QR Code to view
the video for this exercise
G°V ªuÑtß (Simple electric circuit) : V
Fig 1-p LôhPlThÓs[ JÚ G°V ªuÑt±p I
R
ªuú]ôhPm (current) B]Õ úThP¬«u
ARôYÕ, I = V/R
úSoØû] (positive) «XõÚkÕ, Ñ®hÑ (switch)
Utßm TÞ (load) Y¯VôLf ùNuß ÁiÓm, V = ªuÑtßdÏ YZeLlTÓm úYôphúPw
úThP¬«u G§oØû] (negative)dÏ YkÕ
I = ªu Ñt±p ùNpÛm LWih
ªuTôûRûVl éoj§ ùNn¡\Õ.
R = CfÑt±p Es[ ªuRûP«u A[Ü
(Resistance)

úUúX ®[dLlThP ùRôPo×Lû[
(Fig 2)-p Lôh¥Ùs[T¥ JÚ ØdúLôQj§u
êXUôL ϱl©PXôm. CmØdúLôQj§p
GR]Õ U§lûT LiÓ©¥dL ®ÚmסÈoLs?.
AR²p ùTÚ®WûX ûYjÕ®hÓ ©u]o
Ut\ LôW¦L°u (factors) U§lûT A±VXôm.

Fig 1-p Lôh¥Ùs[ ªuÑtß JÚ ê¥V
(closed) (éoj§VûPkR) ªuÑt\ôÏm.
ªuÑtß NôRôWQUôL ùNVpTP
úYiÓùU²p ¸rLiP êuß LôW¦Ls
(factors) ªLÜm Aj§VôY£VUôÏm. AûYLs
ERôWQUôL, ‘V’-u U§lûTd
• ªu CVdÏ ®ûN (Electromotive force-EMF) LiÓ©¥lTRtÏ
CÕ ªuÑt±u Y¯VôL GXdhWôuLû[
SLWf ùNn¡\Õ. I = V
R
• ªuú]ôhPm (Current) GXdhWôuL°u
KhPm readable values are IR so, V = IR
R = V/I
• ªuRûP (Resistance) GXdhWôuL°u
KhPjûR G§ojÕ LhÓlTÓjÕYRtLôL I = V/R
Es[Õ.
GÓjÕdLôhÓ 2
JÚ ªuÑt±p HúRàm CWiÓ
Figþ3p Lôi©jÕs[ ªuÑt±p GqY[Ü
×s°LÞd¡ûP«p ùNpÛm
ªuú]ôhPm Tôn¡\Õ GuTûR
ªuú]ôhPUô]Õ ªu]ÝjRj§tÏ
LiÓ©¥dLÜm.
úSo®¡Rj§Ûm ªuRûPdÏ G§o
®¡Rj§Ûm ùYlT¨ûX Uô\ô§ÚdÏm úTôÕ
CÚdÏm. CÕ Km ®§ BÏm.

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