Virtual Labs IIT Roorkee
Electrical Measurement Laboratory
Measurement of Unknown Capacitance & Resistance Using Wein Bridge
MCB
POWER
Rx
DIGITAL NULL DETECTOR
CIRCUIT DIAGRAM
R1
R2
R3
Rx
C1
Cx
A
UNKNOWN CAPACITANCE
Cx
R1
R2
R3
STEP 1 : Make Connections as per the instructions given below:
1. M1 of MCB - P1 of Power and M2 of MCB - P2 of Power
2. A1 of Amplitude - A3 of Circuit Diagram and A2 of Amplitude - A4 of Circuit Diagram
3. D1 of Digital Null Detector - B of Circuit Diagram
4. D2 of Digital Null Detector - D of Circuit Diagram
5. COM - C of Circuit Diagram
6. CX - D of Circuit Diagram
NOTE : If wire is wrongly connected, Click on node number to detach the wire.
STEP 2 : Click on "CHECK" Button for checking the connections.
STEP 3 : Click on the MCB to Turn ON the supply.
STEP 4 : Set Amplitude to maximum from dropdown.
STEP 5 : Select the resistance values from various dropdown to get minimum value from digital null detector.
STEP 6 : Click on "ADD" button to add the readings to the Observation Table.
NOTE : If combination is wrong then select another combination.
STEP 7 : Add different readings to the table by selecting different values from dropdown.
STEP 8 : Click on "PRINT" button to print the webpage.
STEP 9 : Click on "RESET" button to refresh the webpage.
FORMULA
1. Find Cx (Unknown Capacitance)
Where, Cx = (C1*R2)/R3 , C1 = 0.01µF
2. Find Rx (Unknown Resistance)
Where, Rx = (R1*R3)/R2
| S.NO. | R1(KΩ) | R2(Ω) | R3(Ω) | Rx(KΩ) | Cx(µF) |
|---|