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Tentukan daya disipasi dalam hambatan R1!

Perhatikan gambar berikut!

Tentukan daya disipasi dalam hambatan R1!

Pembahasan

Diketahui :

Rangkaian listrik campuran seri dan paralel

table attributes columnalign right center left columnspacing 0px end attributes row cell R subscript 1 end cell equals cell 30 space straight capital omega end cell row cell R subscript 2 end cell equals cell 60 space straight capital omega end cell row cell R subscript 3 end cell equals cell 70 space straight capital omega end cell row cell I subscript 1 end cell equals cell 4 space straight A end cell end table

Ditanya :

Daya disipasi dalam hambatan R1?

Jawab :

Konsep:

Rumus daya listrik

P equals W over t equals fraction numerator V q over denominator t end fraction equals V I equals open parentheses I R close parentheses I equals I squared R

dengan

table attributes columnalign right center left columnspacing 0px end attributes row P equals cell daya space listrik space left parenthesis watt right parenthesis end cell row W equals cell energi space listrik space left parenthesis straight J right parenthesis end cell row t equals cell waktu space left parenthesis straight s right parenthesis end cell row V equals cell tegangan space listrik space left parenthesis volt right parenthesis end cell row I equals cell kuat space arus space listrik space left parenthesis straight A right parenthesis end cell row R equals cell hambatan space listrik space left parenthesis ohm right parenthesis end cell end table

Penyelesaian:

Mencari daya disipasi pada hambatan R1.

table attributes columnalign right center left columnspacing 0px end attributes row P equals cell open parentheses I subscript 1 close parentheses squared R subscript 1 end cell row blank equals cell open parentheses 4 close parentheses squared open parentheses 30 close parentheses end cell row blank equals cell open parentheses 16 close parentheses open parentheses 30 close parentheses end cell row blank equals cell 480 space watt end cell end table

Dengan demikian, daya disipasi pada R1 sebesar 480 watt.

 


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