Inductance, Capacitance, & Resistance in Circuits

[m4tty]

Hi

Can soneone let me know if ive got these ones right.

8. A circuit consisting of a pure capacitance is connected across an AC supply. Which one of the following gives the phase relationship between the voltage and current in this circuit ?

a) The voltage leads the current by 90

 

[PoorFish]

Id agree with the first three

dunno about the others

but im no expert!!!!!

 

[Andy™]

i think the answers are

8 B

9 A

10 C

11 B

12 A

 

[NozSpark]

CIVIL is the answer!!

capacitor - current leads voltage

inductor - current lags voltage

Also IIRC pure resistance has no effect on phase angle! and transformer cores asre indeed laminated to reduce eddy losses

 

[jayv2009]

beat me to it, i was about to come out with the CIVIL damn

 

[m4tty]

Thanks ever so much for the replies so far been well helpful. Still tryinto get my head round this

11. An inductor has an inductive reactance of 20Ω and a resistance of 20Ω. Which one of the following gives the phase relationship between the voltage and current in this circuit?

a) The current leads the current by 45

 

[Andy™]

it will only be 90

 

[NozSpark]

But resistance has no effect on phase angle, IIRC, so is that a red herring???