What is the principle behind electrical impedance measurement? Choose one of the!
Question: What is the principle behind electrical impedance measurement? Choose one of the 4?
B. Electrical currents will be conducted around the outside surfaces of the body
C. Muscles respond to electrical current , while fat does not
D. Fat has a diiferent electrical resistance from muscle
Answers:
Electrical impedance measurement is simply ohms law. V = I.R
The difference is that impedance also covers capacitance and inductance not only resistance (we call the imaginary stuff 'reactance')
Then impedance in the general case is dependent on frequency. So you need to be able to monitor frequency, voltages, phase lag/lead then you can make a stab at guessing the actual impedance network. Impedance only really applies to a single frequency, so it's important that this is stated.
Unfortunately "none of the above" apply when measuring impedance