What is |2+i|?
- 1
- √3
- 5
- √5
- Something else!
What is (1+i)2/(1−i)?
- eiπ/4
- √2eiπ/4
- ei3π/4
- √2ei3π/4
- Something else!
Which point below best represents 4ei3π/4 on the complex plane?
What is Re[eiωt1+i]?
- 1√2cos(ωt+π/4)
- 1√2cos(ωt−π/4)
- 12cos(ωt+π/4)
- 12cos(ωt−π/4)
- Something else
A resistor (R) and an inductor (L) are in parallel. What is the effective impedance, Zeff across these elements?
- R+L
- R+iωL
- 1/(R+iωL)
- 11/R−i/(ωL)
- Something else?
What is the total impedance of this circuit, Ztotal?
- R+i(ωL+1ωC)
- R+i(ωL−1ωC)
- 1R+1iωL+iωC
- 11R+1iωL+iωC
- None of these
AC voltage V and current I vs time t are as shown:
The graph shows that..
- I leads V ( I peaks before V peaks )
- I lags V ( I peaks after V peaks )
- Neither