Question

What is shunt ? Derive the equation of shunt.​

Answer 1

Answer:

Consider an ammeter has its resistance Rm and it measured only a small current Im. A shunt resistor Rs is placed in parallel with the ammeter for extending their range. Where N is the ratio of the total current (I) to be measured to the full-scale deflection current Im is known as the multiplying power of the shunt.

Explanation:

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Answer 2

Answer:

Shunt resistance = the resistance which has a very low value of resistance is known as shunt resistance.  

it can arrange in both parallel and series methods.

the temperature of the coefficient is very low of shunt resistance.

derivation:-  consider an ammeter having resistance Rm

                  small current Im  

                 shunt resistance Rs  

   

                  I = Is + Im

                 Is = I - Im  

shunt in parellel,  

Is IRs = Im Rm

we have shunt resistance so,

Rs = Im Is / Is = Im Is / ( I- Im )  

solve the equation we get  

N= 1+Rm /Rs  

N is the ratio of total current.

Rs = N/ 1 + Rm