N-01-01-005-vr-008-Casio-fx-82NL
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R1 = 100 Ohm //36 Watt

P = U2 / R

U2 = P * R

U = √ P * R

U = √ 36 * 100

U = 60 volt

P2 = U2 / R

P2 = 602 / 200

P2 = 18 W
P2 = 60            : 200              18 Watt