Question

To measure the resistance and impedance of an inductor with or without iron core with readings

Answer 1

Aim: To measure the impedance and resistance of a inductor with or without iron core.
Apparatus required:
A battery, High resistance rheostat , D.C and A.C ammeter and voltmeter , one way key, A.C source ,inductor coil , iron core and connecting wires.

Procedure :

Measurement of Resistance :

resistance is measured after connecting the circuit by applying Ohm's law.

Measurement Of impedance without Iron core:

--> Make the circuit  as shown in the figure.
---> The Source used is A.C mains with Ac voltmeter and ammeter
.---> Ratio of Voltmeter reading to the corresponding ammeter reading will give the impedance of inductor without Iron core.Measurement Of impedance with soft Iron core:
Now insert the soft iron core inside the hollow cylindrical asbestors core of conductor
Again by using Ohm's Impedence is calculated.

Observation:
Least count of D.C ammeter =---------A
Least of A.C ammeter =--------A
Least count of D.C voltmeter =-------------V
Least count of A.C voltmeter =_--------------V
Zero correction of Ammeter [D.c]=-------A
Zero correction of Ammeter [A.C]=-----A
Zero correction of Voltmeter {A.C]=-------V
Zero correction of D.C voltmeter=----V
Measurement of resistance :
************************************************************************************                                      Without Iron Core
Battery Eliminator          D.C Voltmeter    D.C ammeter  R=V/I           
***********************************************************************************
1.2v
2.4v
3.6v
4.8v
***************************************************************************
Mean value of R is taken =----------- ohm.

Measurement of resistance :
************************************************************************************                                      With Iron Core
Battery Eliminator          D.C Voltmeter    D.C ammeter  R1=V1/I 1          
***********************************************************************************
1.2v
2.4v
3.6v
4.8v
***************************************************************************
Mean value of R1 is taken =----------- ohm.

Measurement Of Impedance of coil
 *********************************************************************************
*Stepdown               Without Iron core
Transformer       A.C Voltmeter       A.C ammeter    Z= Vac/IacReading                  (Vac)                 (Iac)************************************************************************************
1. 2v
2.4v
3. 6v
4. 8V
******************************************************************************

Measurement Of Impedence of coil
 **********************************************************************************
Stepdown               With Soft  Iron core
Transformer       A.C Voltmeter       A.C ammeter    Z1= V1ac/1IacReading                  (V1ac)                 (I1ac)
***********************************************************************************
*1. 2v
2.4v
3. 6v
4. 8V
******************************************************************************
Result :
The reistance of Inductor Coil without core ==------ohms
The resistance of Inductor coil with soft iron ==-ohms
The Impedance of inductor coil without core =-----ohms 
The Impedance of inductor coil with soft iron core =-----ohms