Question

The relationship between voltage, E, current, I, and resistance, Z, is given by the equation E = IZ. If a circuit has a current I = 3 + 2i and a resistance Z = 2 – i, what is the voltage of the circuit? 4 – i

Answer 1

E=IZ=(3 + 2i)(2 – i)=3*2-3i+2i*2-2i*i =6 - 3i+4i -2i²=6-2i²- 3i+4i =6+2+i=8+i

i²=-1

E=8+i