A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
why is resistance of a resistor taken in real form and that of capacitor and inductor taken in complex form.why cant the all be real???
 2 years ago
why is resistance of a resistor taken in real form and that of capacitor and inductor taken in complex form.why cant the all be real???

This Question is Open

nick67
 2 years ago
Best ResponseYou've already chosen the best response.4In a resistor current and voltage are in phase, that is their relation can be expressed with a real number (Resistance, R); in inductors and capacitors current and voltage are out of phase and the only way to express their relation is using a complex number, with a magnitude value and a phase value (Impedance, Z)

gregfeynman
 2 years ago
Best ResponseYou've already chosen the best response.1I agree. And the reason why v and I are out of phase is that the relation between V and I is differential. Differentiating cosine and sine gives sine and cosine respectively. So their phase is out of 90 degree.

thewildones
 2 years ago
Best ResponseYou've already chosen the best response.0yes defenetily into it..

Paulodomingos
 2 years ago
Best ResponseYou've already chosen the best response.0In the resistor, to apply a voltage in the same, the current through it is changed immediately according to the extent of that tension. In the inductor, when this is initially unloaded, to apply a voltage at its terminals, it behaves like an open switch, so there is no passage of electric current in this first moment, while the tension is at its maximum value. When the inductor loads fully, the current tends to get the maximum value and the voltage at the terminals, to zero. In this way, the current is always in delay with respect to tension. This effect occurs exactly the reverse order on the capacitor, which initially downloaded, behaves like a closed key to apply a voltage, so the current is advanced in relation to the voltage. Because, in the inductor and the capacitor, the voltage being out of phase with the current, we use complex numbers to determine their impedance.

estebananaya
 2 years ago
Best ResponseYou've already chosen the best response.0Also, the impedance of a capacitor or an inductor, is a function of the frequency of the voltage or current source(s), whereas the value of a resistance is constant.
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.