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Voltage Divider Rule and KVL-Physics-Lab Report, Exercises of Physics

University of AllahabadPhysics

Prof. Deependu Jain assigned this lab work at Allahabad University. This physics report is proof of work students done in lab. It includes: Kirchoff, Current, Law, Divider, Rule, Verify, Digital, Experiment, Board, Resistors, Multimeter

Typology: Exercises

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EXPERIMENT#:2
OBJECT:
To verify Kirchoff’s Voltage Law. (KVL)
To verify Voltage Divider Rule. (VDR)
EQUIPMENT:
DC power supply (0-30V)
DMM
Resistors of different values
Connecting wires
Digital Experiment Board
THEORY:
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EXPERIMENT#:

OBJECT:

 To verify Kirchoff’s Voltage Law. (KVL)  To verify Voltage Divider Rule. (VDR)

EQUIPMENT:

 DC power supply (0-30V)

 DMM

 Resistors of different values

 Connecting wires

 Digital Experiment Board

THEORY:

KVL:

KVL states that: “Algebraic sum of all voltages in a closed loop is equals to zero”. OR “Sum of the voltage drops in a closed circuit equals the applied voltage”.

VDR:

VDR states that: “The voltage drop across the resistor in series circuit is equal to the value of that resistor times the total voltage across the series components divided by the total resistance of all the series components or voltage drop across a resistance is directly proportional to the value of resistance”.

CIRCUIT DIAGRAM:

RA

RB

RC

PROCEDURE:

STEPS TO PROVE KVL:

 Set the apparatus as shown in the circuit diagram.

R (^) A R (^) A = 219.80k Ω R (^) A = 220k Ω ±5% R (^) B R (^) B = 270.21 k Ω R (^) B = 270 k Ω ±5% R (^) C R (^) C = 100.61 k Ω R (^) C = 100 k Ω ±5% FOR VALUES OF VOLTAGE

V = 10V

V A = R A * V

RA + R B + R C

= 3.63V

VB = R B * V

R A + R B + RC

= 4.53V

V C = R C * V

RA + R B + R C

= 1.63V

Voltage number Voltage values by DMM

Voltage values calculated theoretically V (^) A V (^) A = 3.65V V (^) A = 3.63V V (^) B V (^) B = 4.51V V (^) B = 4.53V V (^) C V (^) C = 1.60V V (^) C = 1.63V

RESULT:

 Total voltage measured by DMM:

V= V A +V B +V C

V= 3.65V+4.51V+1.60V

V=9.76V

 Total voltage calculated manually:

V= V A +V B +V C

V= 3.63V+4.53V+1.63V

V=9.79V

The table for values of voltage verifies Voltage Divider Rule.

Both of the above results show that, Sum of the voltage drops in a closed circuit equals the applied voltage.