September 2018 1 419 Report
Solder dihubungkan dengan tegangan listrik 220 V, sehingga mengalir arus listrik pada elemen pemanas 2 A. Berapakah energi listrik yg digunakan solder apabila dipakai selama :
a. 10 dtk
b. 5 mnt
c. 1 jam

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