Mixed combination?

Question

In which time,We use Mixed combination of Resistance?
Give me a example.

Answer 1

No one is answering your question because, I suspect, no one understands what you are asking. I'm going to attempt to answer the question I think you are asking.

Resistance (R) is just one of three ways a current (and voltage) can be altered in an electrical circuit. The other two are capacitance (C) and inductance (L). Of the three, only R does not change the phase angle of alternating voltage, like the AC voltage your TV runs on.

Combined, R, C, and L give us something called impedance. See Wiki [Source below] for a clear exposition of impedance. R comes generally from electrical circuit components called resistors, C comes from capacitors, and L comes from coils (also called solenoids). We can combine these three components in series, parallel, or a combination of both. This is what I think you mean by the "combination of resistance."

For example:

Total impedance in series is Z = Z1 + Z2 +....+ Zn for n sources of impedance.

If your series circuit had only resistance, total impedance = total resistance = R = R1 + R2 + ... + Rn for n resistors.

Unfortunately, the equation of parallel impedances is a bit more complex. For two impedance devices in parallel where each device has the same plus and minus terminals, the total impedance would be:

Z = (Z1Z2)/(Z1 + Z2)

R, C, and L are typically shown in circuit diagrams as some sort of device, like a resistor, but in fact, the wires and wiring of a circuit can also have resistance, capacitance, and inductance. In other words, the wires themselves can have impedence. So often we show this wiring impedance as a virtual device having the equivalent impedance of the wiring.

Answer 2

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