jj_01_09_001v_003 Casio fx-82NL
Umax = 20 V
de
P = U
2
/ R
P = (U*U) / R
de eff waarde = 0.707 x Umax
Ueff = 0.707 x 20=14.14 V
P = 14.14
2
/ 50 = 4 Watt
P = (14.14 x 14.14) / 50 = ca 4 Watt
┘
14.14 : 50 4 Watt
14.14 x 14.14 : 50 4 Watt
