When does impedance depend on frequency in AC circuits?

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
4 replies · 2K views
pat666
Messages
703
Reaction score
0

Homework Statement


For which of the following AC circuits does impedance depend on frequency? A circuit with
Check all that apply.
a resistor and inductor.
a resistor and capacitor.
only a resistor.



Homework Equations





The Attempt at a Solution


I think that for a capacitor and inductor the frequency would change the impedance but I am not sure?
thanks for any help.
 

Discussion

Physics news on Phys.org
Impedance of the resistance only does not depend on the frequency.
 
so I was right----- thanks--slightly off topic but I have another question
"A circular wire loop of wire has radius 2.3cm and resistance 0.045ohms . A magnetic field is perpendicular to the loop.
At what rate must the field change in order to induce a current of 1.4mA in the loop"
ie. magnetic field/change in time?

I have been searching my textbook and can't find a formula that's relevant.
Would really appreciate some help.
 
Magnetic flux φ = EA, where E is electric field and A is the area of ring.

dφ/dt = A*dE/dt = V = IR.