Impedance & Resistance in terms

[rajaram04]

Hello sir
Please clarify about whats the actual & practical diffrence between impedance & resistance ?

 

[jigs047]

Hello sir
Please clarify about whats the actual & practical diffrence between impedance & resistance ?

if u consider ideal wire, it has no capacitance or inductance.so its impedance is same as resistance.
but for practical wire this is not the case.
wire has some capacitance and inductance.so reactant will change. hence impedance and resistance will be different.

 

[rajaram04]

ohh woww thats a preety nice answer in my carrer . thanks a lot sir now i got the practical sence

so actually what is a reactance practically ?

 

[jigs047]

ohh woww thats a preety nice answer in my carrer . thanks a lot sir now i got the practical sence

so actually what is a reactance practically ?

if any wire has capacitance is C then capacitive reluctance is (1/(2*pi*f*C));
if any wire has capacitance is L then capacitive reluctance is (2*pi*f*L);

impedence Z= R+ (capacitive reactance - inductive reactance);

 

[rajaram04]

kkk whats the meaning of reactance & reluctance in definition form ?
its only formula or expression we can say

 

[jigs047]

kkk whats the meaning of reactance & reluctance in definition form ?
its only formula or expression we can say

as far as i know reluctance is related with coil. while resistance is related to any wire.

 

[rajaram04]

and what about reactance ?

 

[newtonoid]

Impedance can be thought of as an opposition to the flow of electricity -- it opposes electrical current. It has a linear part (resistance) and a nonlinear part (reactance). So, when you say "impedance" you're really talking about the effects of both reactance and resistance.

The nonlinear component of impedance (Reactance) is caused by capacitors and inductors. The linear component of impedance (Resistance) is caused by resistors.

My definition of reluctance would sound too much like text from a physics book, so I'll let someone else take that one.

 

[rajaram04]

hmm why we called linear & non-linear ? how it suits the property ?

 

[godfreyl]

It is not correct to say that resistance is linear or that reactance is non-linear.

BTW, did you think to look in Wikipedia?
Electrical impedance
Electrical resistance
Electrical reactance