Suppose you have a "black box" with two electrical terminals. You are told that inside the box is an electrical circuit, composed of either a resistor and inductor; or a resistor and a capacitor. You are also told that the impedance between those terminals was measured with an input frequency of 1 KHz.
a) Is this impedance inductive, or capacitive?
b) What is the equivalent value of admittance (including phase angle)?
c) Is the circuit inside the box a series circuit, or a parallel circuit?
d) What are the component values (resistance, and capacitance or inductance) of the circuit?
e) What do you expect the impedance, and admittance, of the circuit will be if it is measured at 500 Hz?