82-3 Linearity and superposition Let us first define a linear element as a passive element that has a linear voltage-current relationship linear-resistor D=Ri linear-inductor w=Li linear-capacitor q=Cu We must also define a linear dependent source as a dependent current or voltage source where output current or voltage is proportional only to first power (-) of some current or voltage variable in the circuit or to the sum of such quantities. U,=061+24U2(Yes)U,=0.61(No)§2-3 Linearity and superposition Let us first define a linear element as a passive element that has a linear voltage-current relationship.  q 0 C linear − capacitor q = C i  0 L linear − inductor  = Li We must also define a linear dependent source as a dependent current or voltage source where output current or voltage is proportional only to first power(幂) of some current or voltage variable in the circuit or to the sum of such quantities. 0.6 2.4 ( ) 0.6 ( ) 2 s = i 1 + 2 Yes s = i 1 No 0 i R linear − resistor  = Ri 